The ultimate field guide to the birds of Argentina, an indispensable companion for any
traveller to the region. This spectacular new field guide is the ultimate reference to the birds …

In the Andes, humid‐forest organisms frequently exhibit pronounced genetic structure and
geographic variation in phenotype, often coincident with physical barriers to dispersal …

This authoritative handbook, part of the Helm Identification Guide series, looks in detail at
the beautiful antpittas. Elusive study organisms for ornithologists and highly prized additions …

The sliver of humid tropical and montane forest on the east slope of the Andes in Ayacucho
Department ranks among the least surveyed sectors of the Peruvian Andes. This …

The enigmatic Subtropical Pygmy Owl Glaucidium parkeri, an uncommon and recently
described species (Robbins & Howell 1995), is known from scatered records in the east …

In the Andes, pairs of ecologically similar species are often separated by narrow elevational
sympatry zones but the mechanisms mediating sympatry are not fully understood. Here, we …

Plumage and vocal variation were studied in a widespread New World passerine, Three-
striped Warbler Basileuterus tristriatus. Two parallel north–south clines or step-clines in …

Because the generic name Elliotia proposed by us (Stiles et al. 2017a) was found to be
preoccupied, we herein rename this genus, including a detailed diagnosis; the generic …

The genus Pyrrhura contains at least 24 species widespread mainly through South America.
Pyrrhura molinae (Green-cheeked Conure) and Pyrrhura rupicola (Black-capped Conure) …

The Spanish conquistadores arrived in Peru in 1532. They were followed by chroniclers,
who recorded what they saw or commented on what they heard. The first mention of some …