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Abundance, temporal variation, and microhabitat use of the house sparrow, Passer domesticus (Passeriformes: Passeridae), in urban and anthropogenic environments in Northeastern Brazil

ABSTRACT

The increase in urbanization poses a significant threat to biodiversity, leading to the alteration of natural habitats and intensified competition between native and exotic species. The house sparrow, Passer domesticus (Linnaeus, 1758) is a globally widespread exotic and invasive species known for its environmental adaptability. However, recent studies have indicated that degrees of urbanization and microhabitat characteristics can influence house sparrow populations in diverse ways. In this study, we investigated the abundance, temporal variation, and microhabitat use of house sparrows across three areas with varying degrees of urbanization: urban areas (consisting of residential areas, paved streets, and squares), anthropic fields (including pastures and cultivated fields), and forests in Jacaraú, Northeastern Brazil. From October 2017 to September 2018, we employed the point count method to compare the abundance of house sparrows among the different areas. A total of 1880 records of house sparrows were obtained, with 56.3% observed in urban areas, 43.7% in anthropic fields, and none in the forest, indicating significant variations among the study areas. Throughout the year, active birds were observed in both urban areas and anthropic fields. Although no variations in bird abundance were found among the months in urban areas, a significant difference was observed in March (higher abundance) and October (lower abundance) in anthropic fields. The most frequently utilized microhabitats by house sparrows were ground surfaces, man-made structures, and artificial perches, whereas trees were the least used microhabitats. Our findings confirm that both habitat and microhabitat characteristics play crucial roles in determining the abundance and distribution patterns of the species in Brazil. Furthermore, our results suggest that house sparrows avoid using forests, and these environments can act as barriers to the species’ distribution. These findings enhance our understanding of the ecological dynamics of house sparrows in Brazil and provide valuable insights for management.

KEY WORDS:
Anthropogenic influence; exotic species; synanthropic species; urban adaptation; urban ecology

INTRODUCTION

A consequence of the increasing urbanization of natural areas is the expansion of potentially invasive species (Everett 2000Everett RA (2000) Patterns and pathways of biological invasions. Trends in Ecology & Evolution 15(5): 177-178. https://doi.org/10.1016/S0169-5347(00)01835-8
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). These are considered the world’s second biggest threat to biodiversity, as they are species whose introduction and dispersal threaten the lives of native species, the economy, and public health in the established area (Hulme 2007Hulme PE (2007) Biological invasions in Europe: drivers, pressures, states, impacts and responses. In: Hester RE, Harrison RM (Eds) Biodiversity under threat. Royal Society of Chemistry, Cambridge, 56-80., Matos and Pivello 2009Matos DMS, Pivello VR (2009) O impacto das plantas invasoras nos recursos naturais de ambientes terrestres: alguns casos brasileiros. Ciência e Cultura 61(1): 27-30. http://cienciaecultura.bvs.br/scielo.php?script=sci_arttext&pid=S0009-67252009000100012&lng=en&nrm=iso
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, Liebl et al. 2015Liebl AL, Schrey AW, Andrew SC, Sheldon EL, Griffith SC (2015) Invasion genetics: lessons from a ubiquitous bird, the house sparrow Passer domesticus. Current Zoology 61(3): 465-476. https://doi.org/10.1093/czoolo/61.3.465
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). As the process of invasion by exotic species spreads, the alternatives to lessen their impact on natural ecosystems also reduce. However, some invasive species have adaptations that allow them to live in anthropogenic ecosystems where human action does not interfere negatively and where they avoid competition with native species (Sol et al. 2002Sol D, Timmermans S, Lefebvre L (2002) Behavioural flexibility and invasion success in birds. Animal Behaviour 63(3): 495-502. https://doi.org/10.1006/anbe.2001.1953
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, Zalba and Ziller 2007Zalba S, Ziller SR (2007) Adaptive management of alien invasive species: putting the theory into practice. Natureza & Conservação 5(2): 86-92. https://ri.conicet.gov.ar/handle/11336/105961
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, Guimarães 2012Guimarães ECA (2012) Composição da avifauna de duas praças da cidade de Cruz das Almas, Bahia. Monograph, Universidade Federal do Recôncavo da Bahia, Cruz das Almas, 34 pp. https://ri.ufrb.edu.br/handle/123456789/2288
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). Some of them have demographic parameters that exceed those of species that inhabit natural environments, such as larger populations, faster growth rates, and higher productivity, which reflect different modes, behaviors, and adaptations of these organisms to cities (McKinney 2006Mckinney ML (2006) Urbanization as a major cause of biotic homogenization. Biological Conservation 127(3): 247-60. https://doi.org/10.1016/j.biocon.2005.09.005
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).

The house sparrow, Passer domesticus (Linnaeus, 1758), is a small passerine native to parts of Asia, North Africa, and most of Europe, but has successfully established populations worldwide, including North America, Australia, South Africa, and South America (Hanson et al. 2020Hanson HE, Mathews NS, Hauber ME, Martin LB (2020) The house sparrow in the service of basic and applied biology. Elife 9: e52803. https://doi.org/10.7554/eLife.52803
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, BirdLife International 2023BirdLife International (2023) Species factsheet: Passer domesticus. http://datazone.birdlife.org/species/factsheet/house-sparrow-passer-domesticus [Accessed: 27/06/2023]
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). It is a highly adaptable species, thriving in diverse habitats ranging from urban areas to rural landscapes. The house sparrows are not typically considered a characteristic or dominant species in natural forest ecosystems. Their presence in forests is usually scarce. The species is generally associated with human-mediated factors such as residential areas (houses, flats), allotments, gardens, and agricultural fields, where they find supplementary foraging sites, food sources, and nesting opportunities (Ramos-Elvira et al. 2023Ramos-Elvira E, Banda E, Arizaga J, Martín D, Aguirre JI (2023) Long-term population trends of house sparrow and Eurasian Tree Sparrow in Spain. Birds 4(2): 159-170. https://doi.org/10.3390/birds4020013
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). In more remote and undisturbed forests, other bird species are usually more prevalent and adapted to specific ecological conditions (Menon et al. 2013Menon M, Devi P, Mohanraj R (2013) Habitat variability and spatial assemblages of House Sparrows (Passer domesticus) along a gradient of urbanization. IOSR Journal of Environmental Science, Toxicology and Food Technology 4(6): 1-11. https://www.iosrjournals.org/iosr-jestft/papers/vol4-issue6/A0460111.pdf
https://www.iosrjournals.org/iosr-jestft...
). Due to their adaptability and close association with human habitats, house sparrows have become an important model species for urban ecology studies and avian behavior research (Shaw et al. 2008Shaw LM, Chamberlain D, Evans M (2008) The House Sparrow Passer domesticus in urban areas: reviewing a possible link between post-decline distribution and human socioeconomic status. Journal of Ornithology 149(1): 293-299. https://doi.org/10.1007/s10336-008-0285-y
https://doi.org/10.1007/s10336-008-0285-...
). Investigations into the species’ response to urbanization have highlighted the influence of human-altered environments on their distribution and population dynamics. Genetic studies have provided insights into the evolutionary history of house sparrows and their ability to adapt to various ecological conditions (Liebl et al. 2015Liebl AL, Schrey AW, Andrew SC, Sheldon EL, Griffith SC (2015) Invasion genetics: lessons from a ubiquitous bird, the house sparrow Passer domesticus. Current Zoology 61(3): 465-476. https://doi.org/10.1093/czoolo/61.3.465
https://doi.org/10.1093/czoolo/61.3.465...
).

In Brazil, the house sparrow is considered an invasive exotic species, being registered in 2154 municipalities in 26 states (Lim and Sodhi 2004Lim HC, Sodhi NS (2004) Responses of avian guilds to urbanization in a tropical city. Landscape and Urban Planning 66(4): 199-215. https://doi.org/10.1016/S0169-2046(03)00111-7
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, Anderson 2016, Ferreira 2017Ferreira MC (2017) Distribuição geográfica no Brasil e parâmetros reprodutivos de pardais (Passer domesticus) nativos e introduzidos. Ms. Dissertation, Universidade de Brasília, Brasília, 79 pp. http://repositorio2.unb.br/jspui/handle/10482/23084
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, Wikiaves 2023Wikiaves (2023) Passer domesticus: pardal Wikiaves (2023) Passer domesticus: pardal https://www.wikiaves.com.br/wiki/pardal [Accessed: 10/08/2023]
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). The species is among the most abundant birds in Brazilian urbanized areas (Carvalho 2012Carvalho VCDS (2012) Monitorização de populações de aves em zonas urbanas. Ms. Dissertation, Universidade de Aveiro, Aveiro, 51 pp. http://hdl.handle.net/10773/10090
http://hdl.handle.net/10773/10090...
). The house sparrow arrived in Brazil in 1903, when it was introduced in Rio de Janeiro by the mayor at the time, whose objective was to carry out the biological control of invertebrates that threatened the health of the population and local plantations (Liebl et al. 2015Liebl AL, Schrey AW, Andrew SC, Sheldon EL, Griffith SC (2015) Invasion genetics: lessons from a ubiquitous bird, the house sparrow Passer domesticus. Current Zoology 61(3): 465-476. https://doi.org/10.1093/czoolo/61.3.465
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, Wikiaves 2023Wikiaves (2023) Passer domesticus: pardal Wikiaves (2023) Passer domesticus: pardal https://www.wikiaves.com.br/wiki/pardal [Accessed: 10/08/2023]
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). However, it became unwanted in several places because they are hosts and transmitters of parasites, for example, Salmonella enterica, Toxoplasma gondii, Neospora caninum, Triatoma sordida, and helminths (Brasil and Amato 1992Brasil MC, Amato SB (1992) Faunistic analysis of the helmints of sparrows (Passer domesticus L., 1758) captured in Campo Grande, Rio de Janeiro, RJ. Memórias do Instituto Oswaldo Cruz 87(1): 43-48. https://doi.org/10.1590/S0074-02761992000500009
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, Pennycott et al. 2006Pennycott TW, Park A, Mather HA (2006) Isolation of different serovars of Salmonella enterica from wild birds in Great Britain between 1995 and 2003. Veterinary Record 158 (24): 817-820. https://doi.org/10.1136/vr.158.24.817
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, Gondim et al. 2010Gondim LSQ, Abe-Sandes K, Uzêda RS, Silva MAS, Santos SL, Mota RA, et al. (2010) Toxoplasma gondii and Neospora caninum in sparrows (Passer domesticus) in the Northeastof Brazil. Veterinary Parasitology 168(1-2): 121-124. https://doi.org/10.1016/j.vetpar.2009.09.055
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, GISD 2019GISD (2019) Global Invasive Species Database Passer domesticus. http://www.iucngisd.org/gisd/speciesname/Passer+domesticus [Accessed: 03/02/2021]
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, Santos et al. 2020Santos LSS, Mascarenhas CS, Santos PRS, Farias NAR (2020) Helminth fauna of Passer domesticus (Passeriformes: Passeridae) in the southern extreme of Brazil. Revista Mexicana de Biodiversidade 91: e913109. https://doi.org/10.22201/ib.20078706e.2020.91.3109
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).

Despite their wide distribution in Brazil, it’s extremely limited the occurrence of the house sparrow in extensive forest areas, with several occurrence gaps in forest environments of Amazonia, Cerrado, and Atlantic Forest regions (Ferreira 2017Ferreira MC (2017) Distribuição geográfica no Brasil e parâmetros reprodutivos de pardais (Passer domesticus) nativos e introduzidos. Ms. Dissertation, Universidade de Brasília, Brasília, 79 pp. http://repositorio2.unb.br/jspui/handle/10482/23084
http://repositorio2.unb.br/jspui/handle/...
). This absence may be due to negative interactions with native forest passerines, or ecological barriers arising from the structure of the natural ecosystem, which may not benefit the occurrence of the species (Anderson 2006Anderson TR (2006) Biology of the ubiquitous house sparrow: from genes to populations. Oxford University Press, New York, 560 pp.), leading to a preference of the species for open, urbanized landscapes. Herein, we recorded the abundance of the house sparrow in Jacaraú, Northeastern Brazil, to evaluate how species occur in forests, anthropogenic grassland, and urban habitats. We also verified the variation of the occurrences during a year and the preference for the use of specific microhabitats.

MATERIAL AND METHODS

Study Area

The study was conducted in the municipality of Jacaraú (Fig. 1), state of Paraíba, 73 km from the capital João Pessoa, located in the Immediate Geographical Region of Mamanguape - Rio Tinto. It has an estimated population of 14,450 inhabitants and a land area equivalent to 253,033 km2. It presents a tropical rainy climate with a dry summer and is represented by two regional ecosystems, Caatinga and Atlantic Forest (IBGE 2020IBGE (2020) Censo Demográfico. Instituto Brasileiro de Geografia e Estatística. https://cidades.ibge.gov.br/brasil/pb/jacarau/panorama [Accessed: 03/02/2021]
https://cidades.ibge.gov.br/brasil/pb/ja...
) - AsKöppen climate classification, Tropical savanna with dry summer with Driest month precipitation in summer is less than 60 mm.

To allocate sample units in different habitat conditions, three habitat areas were established within the municipality boundary; these areas were classified as urban areas, anthropogenic grassland, and forest (Fig. 1).

Figure 1
(A) Schematic map showing the study area: Jacaraú, Paraíba, northeast Brazil; (B-D) surveyed environments: (B) urban area of the city of Jacaraú; (C) anthropic field; (D) forest. Photos: Mayara O. Vicente.

The urban area (6°36’53.75”S, 35°17’28.60”W) covers 86 ha, which makes it possible to picture major changes in the natural landscape, continuous construction, a high number of artificial perches (poles, wires), a larger number of residents and random presence of trees and bushes. The Anthropic field (6°36’59.59”S, 35°16’42.65”W) cover 75 ha and is characterized by the presence of pastures, scattered trees and bushes, and agricultural crop, reduction in the number of buildings and inhabitants. This environment does not have paving, being found only dirty roads. The forest (6°37’7.00”S, 35°15’47.62”W) covers 111 ha, being a natural patch of the Atlantic Forest, with the presence of shrubs, low trees, and grasses on the edges. This environment does not have the presence of constructions or buildings, but there is anthropic interference, such as sugar cane crops, in its boundaries.

Field sampling

We used the point count method (Bibby et al. 2000Bibby CJ, Burgess ND, Hill DA, Mustoe SH (2000) Bird census techniques. Elsevier, Academic Press, Amsterdam, 341 pp.) to determine the house sparrow relative abundance in each area. All surveys were conducted between October 2017 and September 2018, being three consecutive days of counting per month.

We conducted 10 points in each habitat area per month totaling 120 points per habitat. The points were randomly selected, and the birds were surveyed inside a 50 m circumference radius for each point. The points were separated by at least 200 m or more from each other. The searches took five minutes per point, and they were conducted at sunrise, between 5:30 a.m. and 7:30 a.m. All surveys were conducted by the same researcher, and the records were made visual and auditory, being some specimens photographed and recorded (Fig. 2)

Figure 2
The house sparrow Passer domesticus in Jacaraú, northeast Brazil: (A) a male using a building microhabitat; (B) a female on the ground. Photos: Mayara O. Vicente.

The microhabitat structures used by house sparrows during sampling were based on personal observations and followed the groups: (A) Trees - includes sparrow individuals observed in herbs, tree branches, and bushes; (B) Ground - gathers individuals observed on exposed soil, soil with vegetation and on paving; (C) Buildings - includes individuals observed in residential modifications or man-made structures that may serve as nesting sites for the sparrow, such as roofs, walls of houses, satellite dishes and air conditioners; (D) Artificial perches - attaches individuals observed during landing to structures such as poles, wires and fences. Each observed sparrow was categorized into one of the groupings presented.

Data Analyzes

To analyze variations in sparrow abundance between sampled habitat areas, microhabitats, and seasonality throughout the year, we performed Kruskal-Wallis tests, with the post-hoc Nemenyi (Elliott and Hynan 2011Elliott AC, Hynan LS (2011) A SAS macro implementation of a multiple comparison post hoc test for a Kruskal-Wallis analysis. Computer Methods and Programs in Biomedicine 102(1): 75-80. https://doi.org/10.1016/j.cmpb.2010.11.002
https://doi.org/10.1016/j.cmpb.2010.11.0...
). The analysis was conducted in the RStudio statistical software (version 1.1.456) using the “PMCMR” package (Pohlert 2014Pohlert T (2014) The Pairwise Multiple Comparison of Mean Ranks Package (PMCMR). https://CRAN.R-project.org/package=PMCMR [Accessed: 14/03/2019]
https://CRAN.R-project.org/package=PMCMR...
). For all analyses, a 95% confidence interval was considered. Through seasonality, we intend to verify if there is temporal variation in the abundance of the species or if it is a resident.

RESULTS

We recorded 1,880 house sparrows at the counting points for one one-year survey, being 56.3% registered in the urban area, 43.7% in the anthropic field, and none in the forest. There was a significant difference among the sampled habitat areas (KW-x2 = 26.141; df = 3; p < 0,01), with forest records significantly different in urban and anthropic field (p > 0.05). However, no difference between the urban area and the anthropic field (p > 0.05) (Fig. 3).

Figure 3
Variation in house sparrow, Passer domesticus, abundance between environments with different levels of urbanization. In Boxplot, the box is delimited by the 1st and 3rd quartiles, the median is represented by the horizontal line inside the box, and the extreme vertical lines represent the minimum and maximum values.

There was no temporal variation in the abundance of house sparrows recorded in the urban area (KW-x2 = 9.8063; df = 11; p > 0.05). However, there was a significant temporal variation (KW-x2 = 27.012; df = 11; p < 0.05) in the anthropic field, and March was the month of greatest contact with the species and October and January were the least (Fig. 4).

Figure 4
Temporal distribution of house sparrow, Passer domesticus, abundance in the urban area and the anthropic field, from October 2017 to September 2018.

There was a significant difference in the use of micro-habitat structures in the urban area (KW-x2= 25.456; df = 3; p < 0.01) and in the anthropic field (KW-x2 = 23.822; df = 3; p < 0.01). Most records were done on ground and artificial perches in the urban area, significantly differing from the record on trees (p < 0.01). In the anthropic field, the highest numbers of contacts were on the ground, constructions, and perches, which differed significantly from trees (p < 0.01) (Fig. 5).

Figure 5
Variation in the use of microhabitat structures from October 2017 to September 2018: (A) urban area; (B) anthropic field.

DISCUSSION

Our findings support the evidence that the house sparrow occurs in anthropic habitats and avoids natural habitats, but there is a temporal variation in their abundance in diffe rent anthropic habitats. While house sparrows are abundant in the cities for the whole year, there is a temporal variation in abundance in the anthropic fields. Human buildings are the main microhabitats used by house sparrows during activity, such as ground surfaces, man-made structures, and artificial perches, and trees are often avoided for this period. These data about habitat use and population abundance provides evidence about the biological association of the house sparrow with anthropic habitats and their potential dispersion ease when natural landscapes are modified.

The absence of individuals in the forests, coupled with their presence in anthropogenic environments utilizing diverse structures, provides evidence that urban areas in northeast Brazil can positively impact the population of the house sparrow. This preference for urbanized environments has also been explored in population studies of the species in other Brazilian regions (Lima 2012Lima ML (2012) Expansão do Pardal no Brasil: genética e parasitismo. PhD Thesis, Universidade de Brasília, Brasília, 185 pp. http://icts.unb.br/jspui/handle/10482/11260
http://icts.unb.br/jspui/handle/10482/11...
, Ferreira 2017Ferreira MC (2017) Distribuição geográfica no Brasil e parâmetros reprodutivos de pardais (Passer domesticus) nativos e introduzidos. Ms. Dissertation, Universidade de Brasília, Brasília, 79 pp. http://repositorio2.unb.br/jspui/handle/10482/23084
http://repositorio2.unb.br/jspui/handle/...
, Hanson et al. 2020Hanson HE, Mathews NS, Hauber ME, Martin LB (2020) The house sparrow in the service of basic and applied biology. Elife 9: e52803. https://doi.org/10.7554/eLife.52803
https://doi.org/10.7554/eLife.52803...
). These areas offer more suitable locations for feeding and nesting, provide escape from predators, and are less influenced by competitors such as the Saffron Finch, Sicalis flaveola (Linnaeus, 1766) (Alexandre et al. 2022Alexandre DH, Severo-Neto F, Schunck F, Guix JC, Souza FL (2022) Habitat use by House Sparrow (Passer domesticus) in Campo Grande, Brazil. The Wilson Journal of Ornithology 134(4): 688-694. https://doi.org/10.1676/21-00097
https://doi.org/10.1676/21-00097...
). Consequently, the house sparrow has become one of the most successful birds in large Brazilian cities such as São Paulo, Rio de Janeiro, and Brasília. However, it is not prevalent in cities in northern Brazil (Sick 1997Sick H (1997) Ornitologia Brasileira. Nova Fronteira, Rio Janeiro, 910 pp., Ferreira 2017Ferreira MC (2017) Distribuição geográfica no Brasil e parâmetros reprodutivos de pardais (Passer domesticus) nativos e introduzidos. Ms. Dissertation, Universidade de Brasília, Brasília, 79 pp. http://repositorio2.unb.br/jspui/handle/10482/23084
http://repositorio2.unb.br/jspui/handle/...
), which are surrounded by the Amazon Forest, which may act as a barrier to the species’ dispersal.

Areas inhabited by house sparrows can influence the composition and structure of native passerine bird communities through synergistic interactions with human activities (Bokony et al. 2010Bókony V, Kulcsár A, Liker A (2010) Does urbanization select for weak competitors in house sparrows? Oikos 119(3): 437-444. https://doi.org/10.1111/j.1600-0706.2009.17848.x
https://doi.org/10.1111/j.1600-0706.2009...
). Certain behavioral traits and habits have contributed to the global success of house sparrow populations. These include their aggressive behavior, such as attacking birds of smaller or similar size in foraging areas and actively destroying the nests of other species (Gowaty 1984Gowaty PA (1984) House sparrows kill eastern bluebirds. Journal of Field Ornithology 55(3): 378-380. http://www.jstor.org/stable/4512922
http://www.jstor.org/stable/4512922...
, Kimball 1997Kimball RT (1997) Male morphology and nest-site quality in house sparrows. Wilson Bull 109(4): 711-719. https://www.jstor.org/stable/4163871
https://www.jstor.org/stable/4163871...
, Macgregor-Fors et al. 2010Macgregor-Fors I, Morales-Pérez L, Quesada J, Schondube JE (2010) Relationship between the presence of house sparrows (Passer domesticus) and neotropical bird community structure and diversity. Biological Invasions 12(1): 87-96. https://doi.org/10.1007/s10530-009-9432-5
https://doi.org/10.1007/s10530-009-9432-...
). In Northeast Brazil, this aggressive behavior is exemplified in interactions with two native species: the Tropical Wren, Troglodytes musculus Naumann, 1823, known locally as “corruíras”, and the Brazilian Canary, Sicalis flaveola brasiliensis (Gmelin, 1789). House sparrows commonly displace wrens from nesting sites, leading to direct competition for these locations. This competition arises because both species exhibit similar nesting behaviors, such as occupying cavities in human-made structures. Exotic sparrows also deter other birds from feeders by their habit of flocking and vocalizing loudly, displaying threatening behaviors, and harassing other birds. This behavior can permanently drive away other birds, as observed with canaries during foraging in the presence of house sparrows (Sick 1997Sick H (1997) Ornitologia Brasileira. Nova Fronteira, Rio Janeiro, 910 pp.).

As a synanthropic species, it can be found in cities as well as suburbs and farmlands. We observed a significant abundance of species in anthropogenic grasslands. This adaptation to living in urban environments and open agricultural ecosystems aids in the species’ dispersal, facilitating the expansion of the sparrow across all continents except Antarctica, always in proximity to human habitations (Hanson et al. 2020Hanson HE, Mathews NS, Hauber ME, Martin LB (2020) The house sparrow in the service of basic and applied biology. Elife 9: e52803. https://doi.org/10.7554/eLife.52803
https://doi.org/10.7554/eLife.52803...
). Although plantations are adjacent to forest areas, we only recorded house sparrows in plantations and not in forests. The occurrence of the species in north Brazil is scarce, with current records spatially related to open roads cutting through the Amazon rainforest (Ferreira 2017Ferreira MC (2017) Distribuição geográfica no Brasil e parâmetros reprodutivos de pardais (Passer domesticus) nativos e introduzidos. Ms. Dissertation, Universidade de Brasília, Brasília, 79 pp. http://repositorio2.unb.br/jspui/handle/10482/23084
http://repositorio2.unb.br/jspui/handle/...
, Wikiaves 2023Wikiaves (2023) Passer domesticus: pardal Wikiaves (2023) Passer domesticus: pardal https://www.wikiaves.com.br/wiki/pardal [Accessed: 10/08/2023]
https://www.wikiaves.com.br/wiki/pardal...
). The house sparrow is a synanthropic species that can experience population reduction where human actions are a contributing factor to population exclusion (Ravinet et al. 2018Ravinet M, Elgvin TO, Trier C, Aliabadian M, Gavrilov A, Sætre G-P (2018) Signatures of human-commensalism in the house sparrow genome. The Royal Society B: Biological Sciences 285: 20181246. https://doi.org/10.1098/rspb.2018.1246
https://doi.org/10.1098/rspb.2018.1246...
), such as reforestation practices, for instance. Climatic and vegetation variables significantly influence house sparrows dispersion, underscoring the importance of environmental conditions on population persistence since several sparrow populations are declining (Geue et al. 2016Geue JC, Vágási CI, Schweizer M, Pap PL, Thomassen HA (2016) Environmental selection is a main driver of divergence in house sparrows (Passer domesticus) in Romania and Bulgaria. Ecology and Evolution 6(22): 7954-7964. https://doi.org/10.1002/ece3.2509
https://doi.org/10.1002/ece3.2509...
). These studies conducted with populations in Romania and Bulgaria highlight road construction in forest areas as creating favorable environments for its dispersal and population expansions and suggest that reforestation actions can reduce its distribution (Anderson 2006Anderson TR (2006) Biology of the ubiquitous house sparrow: from genes to populations. Oxford University Press, New York, 560 pp., Geue et al. 2016).

We observed seasonal variation in house sparrow abundance in pastures or anthropic fields but not in urban areas, indicating that while the species remains active throughout the year in cities, its activity may be influenced by climate conditions in environments with fewer refuges. March and April, when there was the greatest contact with the species, are months with high rainfall rates in the municipality, while October and November have less rainfall and the contacts were the least. However, other studied Brazilian regions with different climatic regimes also reported that the species was active and abundant throughout the year (Sacco et al. 2013Sacco AG, Bergmann FB, Rui AM (2013) Bird assemblages in the urban area in the city of Pelotas, Rio Grande do Sul, Brazil. Biota Neotropica 13(2): 153-162. https://doi.org/10.1590/S1676-06032013000200014
https://doi.org/10.1590/S1676-0603201300...
, Cardoso et al. 2013Cardoso CO, Santos AGS, Gomes DN, Tavares AA, Guzzi A (2013) Análise e composição da avifauna no Aeroporto Internacional de Parnaíba, Piauí. Ornithologia 6(1): 89-101. https://www.gov.br/icmbio/pt-br/assuntos/centros-de-pesquisa/cemave/produtos-e-servicos/revista-ornithologia/arquivos_pdf_revistas/ornithologia_06_1_2013.pdf
https://www.gov.br/icmbio/pt-br/assuntos...
, Franchin 2003Franchin AC (2003) A riqueza da avifauna no Parque do Sabiá, zona urbana de Urbelândia (MG). Ms. Dissertation, Universidade Federal de Uberlândia, Uberlândia, 40 pp. https://repositorio.ufu.br/handle/123456789/26767
https://repositorio.ufu.br/handle/123456...
). Therefore, to manage this exotic species in Brazil, it’s important to understand the influence of climate and habitat associated with their reproductive period throughout the year, with built-up environments favoring nesting areas (Furtado 1979Furtado DS (1979) Acerca da proliferação de pardais nos Açores. Informação Agrícola da Ilha de São Miguel 1(3): 3-7. http://hdl.handle.net/10400.3/1021
http://hdl.handle.net/10400.3/1021...
, Ferreira 2017Ferreira MC (2017) Distribuição geográfica no Brasil e parâmetros reprodutivos de pardais (Passer domesticus) nativos e introduzidos. Ms. Dissertation, Universidade de Brasília, Brasília, 79 pp. http://repositorio2.unb.br/jspui/handle/10482/23084
http://repositorio2.unb.br/jspui/handle/...
).

We frequently observe individuals of the species utilizing man-made structures, such as buildings and artificial perches. These structures provide nesting sites and protect roosting locations. A study conducted in central Brazil demonstrated that while perches did not influence the richness and abundance of local avifauna, their implementation in degraded areas attracted sparrow populations (Guimarães 2014Guimarães MM (2014) Uso de poleiros artificiais pela avifauna em duas áreas degradadas do município de Formosa, Goiás. Monograph, Instituto Federal de Educação, Ciência e Tecnologia, Formosa, 81 pp. https://ifg.edu.br/attachments/article/1658/MAYARA%20MACHADO%20GUIMAR%C3%83ES_2014.pdf). Sparrows benefit from architectural structures less than 5 m in height. Despite their adaptation to urban environments, the presence of grasses enhances their use of urban landscapes (Alexandre et al. 2022Alexandre DH, Severo-Neto F, Schunck F, Guix JC, Souza FL (2022) Habitat use by House Sparrow (Passer domesticus) in Campo Grande, Brazil. The Wilson Journal of Ornithology 134(4): 688-694. https://doi.org/10.1676/21-00097
https://doi.org/10.1676/21-00097...
). However, the use of cavities in buildings can also aid in the dispersion of zoonoses, posing potential harm to people cohabiting with these urban birds, such as house sparrows or domestic pigeons (Forattini et al. 1971Forattini OP, Silva EOR, Ferreira AO, Rabello EX, Pattoli DGB (1971) Aspectos ecológicos da tripanossomose americana: III-Dispersão local de triatomíneos, com especial referência ao Triatoma sordida. Revista de Saúde Pública 5(2): 193-205. https://doi.org/10.1590/S0034-89101971000200002
https://doi.org/10.1590/S0034-8910197100...
). To mitigate this risk, it is crucial to raise public awareness to prevent direct contact with the birds (Araújo et al. 2016Araújo CD, Carvalho FG, Albuquerque LB (2016) Levantamento epidemiológico das Zoonoses transmitidas por pombos em Campo Grande - MS. Multitemas 1(16): 28-50. https://www.multitemas.ucdb.br/multitemas/article/view/1039
https://www.multitemas.ucdb.br/multitema...
). Finally, we recorded the highest number of individuals on the ground, as the sampling time coincided with these birds’ foraging time (Scherer et al. 2010Scherer JFM, Scherer AL, Petry MV (2010) Estrutura trófica e ocupação de hábitat da avifauna de um parque urbano em Porto Alegre, Rio Grande do Sul, Brasil. Biotemas 23(1): 169-180. https://pdfs.semanticscholar.org/50ad/85966d7b3a5a25c5c67c95f97e54bb9d4e30.pdf
https://pdfs.semanticscholar.org/50ad/85...
). The house sparrow exhibits a generalist habit, incorporating a range of items into its diet, from grains to remnants of human food. This feeding habit is one of the characteristics that benefit synanthropic birds since humans produce a lot of resources for them (Silveira 2012Silveira LF (2012) O pardal vai se extinguir no Brasil? Cães & Cia 398(1): 48-49. https://www.researchgate.net/profile/Luis-Silveira/publication/273368532_Mundo_das_Aves_O_Pardal_vai_se_extinguir_no_Brasil/links/54ff275c0cf2741b69f4048f/Mundo-das-Aves-O-Pardal-vai-se-extinguir-no-Brasil.pdf
https://www.researchgate.net/profile/Lui...
, Ribeiro and Cristo 2017Ribeiro JS, Cristo SS (2017) Comunidade de aves na zona urbana de Paragominas, Pará. Atualidades Ornitológicas 198(1): 33-41. https://docplayer.com.br/60607004-Comunidade-de-aves-na-zona-urbana-de-paragominas-para.html
https://docplayer.com.br/60607004-Comuni...
).

Final remarks

Our findings highlight the adaptability of house sparrows to urban and anthropogenic environments, where they exploit specific microhabitats to meet their ecological requirements. Its aversion to forests can create conditions to prevent or control the expansion of the species since the house sparrow is an exotic species. Future studies should continue to monitor the impact of environmental changes on sparrow populations, given their sensitivity to climatic and habitat variables. This could provide valuable insights into urban ecology and the effects of anthropogenic influence on wildlife.

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ADDITIONAL NOTES

Edited by

Editorial responsibility

Claudia Hermes

Data availability

Data citations

BirdLife International (2023) Species factsheet: Passer domesticus http://datazone.birdlife.org/species/factsheet/house-sparrow-passer-domesticus [Accessed: 27/06/2023]

GISD (2019) Global Invasive Species Database Passer domesticus http://www.iucngisd.org/gisd/speciesname/Passer+domesticus [Accessed: 03/02/2021]

Publication Dates

  • Publication in this collection
    06 Sept 2024
  • Date of issue
    2024

History

  • Received
    01 Nov 2023
  • Accepted
    01 Apr 2024
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