Revisão e atualização da lista das aves do Rio Grande do Sul, Brasil

Abstract

ABSTRACT. Revision and updating of the list of birds of Rio Grande do Sul, Brazil. The list of birds of the state of Rio Grande do Sul (281,749 sq. km), southern Brazil, is revised and updated. Species were included in the list according to two main criteria: (i) occurrence in the state documented with tangible evidence -study skin or complete specimen, photograph, video or vocal recording -published in the literature or available for independent verification in scientific collections or archives of public access, or (ii) at least one state record supported by non-material evidence allowing an unequivocal diagnosis of the taxon, such as a circumstantiated report, published or provided to the authors, containing a detailed description of or reference to the diagnostic features observed. Species mentioned for the state that do not conform to these criteria were not included in the main list and were regarded as probable or hypothetical, according to the evidence available and the distributional coherence of the existing records. The final list comprises 661 species, of which 649 are documented by physical evidence. Another 10 and 16 species are listed as probable and hypothetical, respectively. Compared with the previous list, 44 species were added and seven were excluded or substituted, resulting in a net increase of 37 species. Fregetta grallaria (Vieillot, 1818), Polytmus guainumbi (Pallas, 1764), Nonnula rubecula (Spix, 1824), Stymphalornis acutirostris Bornschein, Reinert & Teixeira, 1995, Fluvicola albiventer (Spix, 1825, and Xenopsaris albinucha (Burmeister, 1869) are mentioned for the state for the first time. The number of species added since the last review corresponds to an average increase of slightly more than four species per year. By examining the recent additions in retrospect, it is clear that the number of bird species known to occur in Rio Grande do Sul should continue to grow at a similar rate over the next decade or so. In view of this, some guidelines for improving future revisions of the state checklist are proposed. In order to better understand new occurrences of birds over time, the use of adequate criteria to distinguish range extensions from range expansions, and instances of vagrancy from pseudo-vagrancy, is recommended.KEYWORDS. Avifauna, distribution records, new occurrences, documentation, collections. RESUMO.Neste artigo, a lista das aves do estado do Rio Grande do Sul (281.749 km 2 ) é revisada e atualizada. A inclusão de espécies na lista seguiu dois critérios principais: (i) ocorrência no estado documentada por evidência tangível -pele ou espécime completo, foto, vídeo ou gravação de áudio -publicada na literatura ou disponível para verificação independente em coleções ou arquivos científicos de acesso público, ou (ii) pelo menos um registro no estado acompanhado de evidência não-material que permita a identificação segura do táxon, tal como um relato circunstanciado, publicado ou fornecido aos autores, contendo descrição detalhada ou referência às características diagnósticas ...

Four decades after Belton: a review of records and evidences on the avifauna of Rio Grande do Sul, Brazil

“…Comparing their data with the results of previous reviews, Bencke et al (2010) detected an accelerated increase in the number of species recorded in RGS (over four new species per year in [2001][2002][2003][2004][2005][2006][2007][2008][2009][2010]. They also drew attention to the increased contribution of amateurs to the improvement of the list, either by contributing new occurrences or by providing better documentation.…”

“…Unlike the scenario in most other Brazilian states, the avifauna of Rio Grande do Sul (hereafter RGS) can be considered reasonably well known (Bencke, 2001(Bencke, , 2010Bencke et al, 2010). The assembly of the existing knowledge on the birds of RGS goes back to the end of the nineteenth century, but this relatively short history of investigation is marked by a few decades of fruitfulness interspersed with long periods of minimal or no progress in the ornithological knowledge.…”

“…Since then, four updates of the RGS checklist were published: (1) Belton (1984;1985) -the most important contribution to the ornithology of RGS, including distribution maps for all species listed, indication of museum specimens and original data on field marks, voice, seasonality, abundance, breeding, behavior, and ecology; (2) Belton (1994) -an updated Portuguese version of the previous work; (3) Bencke (2001) -the first review to adopt explicit criteria for the inclusion of species and to consider other types of documentation in addition to museum specimens; and (4) Bencke et al (2010) -the first update produced by a regional, albeit informal, committee of ornithologists from some of the main research institutions in RGS. Therefore, in the last four decades the RGS checklist has been continuously revised and updated in a more or less standardized way, allowing comparisons between lists.…”

“…Recent records and new evidences are thoroughly revised and implemented. Furthermore, as recommended by Bencke et al (2010), we tried to distinguish between range extension vs. expansion and between instances of vagrancy and pseudo-vagrancy when interpreting the new occurrences, in order to contribute to a better understanding of the composition and dynamics of the regional avifauna.…”

Avifauna Na Universidade Do Vale Do Taquari Em Lajeado – Rs

“…Sua avifauna apresenta, até o momento, 1.919 espécies de aves conhecidas (PIACENTINI, 2015). No Rio Grande do Sul tem-se o registro de 661 espécies de aves (BENCKE et al, 2010). Entretanto, estudos referentes as ocorrências regionais da avifauna no Vale do Taquari ainda são escassos.…”