Primeiro registro do Caminheiro-zumbidor no Acre com notas sobre outras aves de ambientes campestres no sudoeste amazônico

This paper presents the first record of the Yellowish Pipit (Anthus lutescens) in the Brazilian state of Acre. This record represents the westernmost record of the species in Brazil and provides evidence of its expansion into the southwestern Amazon basin. We also present information on the occurrence of other bird species, typical of grasslands and other open habitats, e.g., the Burrowing Owl (Athene cunicularia), the White-tailed Hawk (Geranoaetus albicaudatus), the Southern Lapwing (Vanellus chilensis) and the Southern Caracara (Caracara plancus). These species have encroached southwestern Amazônia following environmental changes caused by human activities, such as the construction of highways and the conversion of the rainforest into cattle pasture.Keywords: Aves, Anthus lutescens, Motacillidae, open habitats, range extension.Este trabalho divulga o primeiro registro do Caminheiro-zumbidor (Anthus lutescens) no estado brasileiro do Acre. Este registro é o mais ocidental da espécie em território brasileiro e marca a sua expansão em direção ao sudoeste amazônico. Apresenta também informações sobre algumas espécies de aves típicas de ambientes campestres, tais como a coruja-buraqueira (Athene cunicularia), o gavião-de-rabo-branco (Geranoaetus albicaudatus), o quero-quero (Vanellus chilensis) e o caracará (Caracara plancus), entre outras. Essas espécies vêm ocupando áreas na Amazônia após mudanças ambientais provocadas pelo homem, tais como a abertura de estradas e a conversão das florestas em pastagens para atividades agropastoris.Palavras-chave: Aves, Anthus lutescens, Motacillidae, ambientes abertos, extensão de distribuição

Major range extension for Orange-fronted Plushcrown Metopothrix aurantiaca in the central Amazon of Brazil

Orange-fronted Plushcrown Metopothrix aurantiaca is a unique, but easily overlooked, small furnariid found in the midstorey and canopy of riverine areas in the Amazon. The species' previously published distribution includes parts of southernmost Colombia, eastern Ecuador, eastern Peru, northern Bolivia and western Brazil. In the easternmost part of its distribution (Brazil), M. aurantiaca occurs in the states of Acre, Amazonas and Rondônia, east to 64°W. We present nine new records of the species in Brazil, all of them east of its previously known distribution and together extending the range by c.750 km. These new records derive from sampling that includes collecting expeditions, exhaustive várzea surveys, and incidental observations. We propose a new continuous distribution for this species restricted to white-water river floodplains with known occurrences. © 2019 The Authors