Biological Invasions

, Volume 20, Issue 9, pp 2635–2646 | Cite as

Niche expansion of the common waxbill (Estrilda astrild) in its non-native range in Brazil

  • José Maria Cardoso da Silva
  • Manuella Andrade de Souza
  • Vivian Ribeiro
  • Ricardo B. Machado
Original Paper


The geographical range of a species can change over time due to intrinsic or extrinsic factors, but the ecological niche of a species is hypothesized to be conservative and retained in time and space even during biological invasions. It has been documented that some species can experience niche shifts if natural barriers and other constraints are removed, allowing species to occur in areas with characteristics that are different from its native environment. This paper compares the realized ecological niches of the common waxbill (Estrilda astrild) in Africa (the native range) and Brazil (the non-native range) using reciprocal environmental niche modelling to determine if the species conserves its niche during the colonization of a new region. We found that the common waxbill has expanded its ecological niche in Brazil. This process has been facilitated by human interventions in the country’s natural ecosystems. Brazilian localities where the common waxbill is currently reported have higher temperatures, receive more rainfall, and exhibit denser vegetation coverage than the localities in the species’ native range. We suggest that a combination of intrinsic factors (behavior flexibility to explore and adapt to novel environments) and extrinsic factors (multiple introductions, road development and deforestation, Africanization of the tropical grasslands, and lack of competitors) acted together to facilitate the successful establishment of the common waxbill in the major Brazilian ecological regions and enable the expansion of the species’ ecological niche.


Invasive species Common waxbill Brazil Niche expansion Niche shift 



The authors thank Cory Merow and two anonymous referees for insightful and constructive comments in this manuscript. We are grateful to Luis Barbosa for helping us with the maps. Silva received support from the University of Miami and Swift Action Fund. Machado received a research productivity Grant (#306392/2013-5) from the Brazilian National Council for Scientific and Technological Development (CNPq). Ribeiro received a fellowship from the Coordination for the Improvement of Higher Education Personnel (CAPES), Brazil.

Supplementary material

10530_2018_1723_MOESM1_ESM.pdf (717 kb)
Supplementary material 1 (PDF 717 kb)


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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of GeographyUniversity of MiamiCoral GablesUSA
  2. 2.Instituto Chico Mendes de Conservação da BiodiversidadeFloresta Nacional da Restinga de Cabedelo, RenascerCabedeloBrazil
  3. 3.Departamento de Ecologia, ICC Ala Sul, Campus Universitário Darcy RibeiroUniversidade de BrasíliaBrasiliaBrazil

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