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

Abstract

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.Orange-fronted Plushcrown Metopothrix aurantiaca is a unique, small furnariid with bright plumage and tarsal coloration, distinct from other members of its family (Fig. 1; Remsen 2003). This warbler-like bird forages in pairs or small groups and often associates with mixed-species flocks, feeding mainly by gleaning arthropods from vegetation, even

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“…Dados de plataformas de ciência cidadã têm sido utilizados em revisões de distribuição e extensão geográfica de várias espécies de aves, dentre elas, o gavião Harpagus diodon (Temminck, 1823) (Lees & Martin, 2015), os passeriformes Myiornis auricularis (Vieillot, 1818) (Ruiz-Esparza et al, 2018), Metopothrix aurantiaca (Sclater & Salvin, 1866) (Amaral et al, 2019), Trichothraupis melanops (Vieillot, 1818) (Gomes et al, 2020) e o falconiforme Falco peregrinus (Tunstall, 1771) (Dornas et al, 2019). Em outros casos, registros depositados nos portais de ciência cidadã têm fornecido dados relevantes para estudos de modelagem de nicho ecológico (Sobral et al, 2014;Neto et al, 2017;J.…”