Flutuações mensais na abundância dos Charadriidae e Scolopacidae da praia da Ilha Comprida, São Paulo, Brasil

Abstract

Abstract:We recorded the frequency of occurrence and monthly fluctuations of Charadriidae and Scolopacidae along a 70km transect of beach between Boqueirão Sul and Boqueirão Norte north of Comprida island, São Paulo State over a 1-year period (Jan -2010 to Dec -2010. A total of 12.153 shorebirds were recorded. The greatest abundance occurred between October and April and the lowest occurred between May and September. The most abundant of the 20 species recorded were Charadrius semipalmatus, Charadrius colaris, Vanellus chilensis and Tringa flavipes. The least abundant were Tryngites subruficolis, Limosa haemastica, Tringa melanoleuca and Actitis macularia. Sixteen species were migrants from the Northern Hemisphere, two were migrants from the Southern Hemisphere, and two were residents. Seven species were recorded regularly, five were recorded sporadically, and eight were recorded occasionally. Four Nearctic species were recorded in June and July most likely indicating the presence of non-breeding immature. The number of species and the number of individuals probably fluctuated due to migration or movements between neighbouring beaches. The Comprida Island beach is important migration stopover and wintering sites for many shorebirds in south São Paulo and should be a focus of conservation efforts, especially given the increasing development pressure that threatens these areas.

An overview of migratory birds in Brazil

“…It has a resident population in RS, where breeding has also been recorded (Belton, 1984;Sick, 1997;Maurício et al, 2013). For SP, there are records in May to August (Barbieri et al, 2013;WikiAves, 2016). There are also records for SC between May and July (WikiAves, 2016).…”

First records of Charadrius semipalmatus, Bonaparte 1825 (Charadriidae) and Gelochelidon nilotica Gmelin 1789 (Sternidae) in the State of Minas Gerais, Brazil

“…Both records are remarkable and very unexpected, since the first species is a shorebird, the second a seabird, and the two lakes, where both species were sighted, make part of a complex of about 40 temporary lakes situated at least 380 Km from the Brazilian eastern coast (see Figure 3). Probably this system of temporary lakes is used by these and other Northern migratory species as stopover places, where they may rest and forage (Barbieri et al, 2013), during their passage to the Southern Hemisphere. These records are outside the Brazilian coastline and, as far as it is known, the first for the State of Minas Gerais.…”

Behavioral aspects of waterbirds

“…In general, the migratory birds registered in this work, specially the members of Scolopacidae and Charadriidae, were observed foraging on benthic invertebrates in mud flats off the Brazilian coast (Barbieri and Mendonça, 2005;Barbieri et al, 2013;Silva and Rodrigues, 2015).…”