Survey of a Southern Amazonian Avifauna: The Alta Floresta Region, Mato Grosso, Brazil

Abstract

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Rapid avifaunal collapse along the Amazonian deforestation frontier

“…Because the Rio Cristalino has become the premier ecotourism destination in Brazilian Amazonia for amateur ornithologists, this training period also benefited from the direct assistance of the leading neotropical ornithologists and at least 15 years of intensive ornithological observations at this site (e.g. Zimmer et al, 1997). From June to September 2004, 630 unlimited radius point counts (Blondel et al, 1970(Blondel et al, , 1981 were completed in 21 forest sites, including 20 fragments and one continuous, undisturbed control site.…”

Avian mitochondrial DNA sequence divergence across a headwater stream of the Rio Tapajós, a major Amazonian river

“…When available comparisons were also made from samples taken at other sites in the interfluvia east and west of the Rio Teles Pires. Guild refers to the general foraging stratum and foraging specialization of each species; MCO mid-canopy omnivore, UI understory insectivore, MCFI mid-canopy flock insectivore, UI understory insectivore, MCI/FI a species that only occasionally joins flocks in the mid-canopy, UAF understory antfollower Alexio 2002) and of the subspecies pair Microrhopias quixensis bicolor / emiliae occupying the western (southern) and eastern (northern) river bank, respectively (see Haffer 1997a;Zimmer et al 1997); the forms of M. quixensis may actually represent different biological species too. No genetic material is available for these taxa.…”

“…With one exception (Rhegmatorhina gymnops), these species have extensive distributions that at least span southern Amazonia. A general account of the avifauna of the Alta Floresta -Teles Pires region based on field observations and tape recordings of vocalizations is provided by Zimmer et al (1997), and detailed data on individual species of antbirds by Zimmer and Isler (2003).…”

Avian life‐history determinants of local extinction risk in a hyper‐fragmented neotropical forest landscape

“…A more detailed description of the study landscape is presented elsewhere (Michalski & Peres, 2005;Lees & Peres, 2006). The Alta Floresta region, which has been thoroughly surveyed ornithologically since 1989 (Zimmer et al, 1997), hosts one of the most species-rich avifaunas in South America with nearly 600 species recorded within 65 km of the town. The region supports many regional endemics and hitherto little-known taxa, but only a single species is considered to be threatened (Anodorhynchus hyacinthinus) and a further seven species considered near-threatened.…”