Emilio Ariel Jordan

• Doctor en Ciencias Naturales (UNLP)-PhD
• Investigador - Resarcher at Comisión Nacional de Investigaciones Cientificas y Técnicas.

The speciose family Tyrannidae harbours numerous morphologically cryptic species that differ most notably in their innate vocalisations. Among these, five belong to the Neotropical genus Pseudocolopteryx , including a pair of cryptic sister species, P. flaviventris and P. citreola , which differ markedly in vocalisations and exhibit an extremely lo...

Ecological and geographical factors shape the current distribution of species. Analysing their interplay in a phylogenetic framework is key to understand the historical processes that have shaped the evolution of a group. Here, we modelled the ecological niches and geographic distributions of the five species of doraditos ( Pseudocolopteryx spp.) t...

A major barrier to advancing ornithology is the systemic exclusion of professionals from the Global South. A recent special feature, Advances in Neotropical Ornithology, and a shortfalls analysis therein, unintentionally followed a long-standing pattern of highlighting individuals, knowledge, and views from the Global North, while largely omitting...

Citizen science data are increasingly used for biodiversity monitoring. However, concerns are often raised over the accuracy of species identifications in citizen science databases, as data are collected mostly by non‐professionals. Misidentifications can simultaneously generate two error types: false positives (erroneous reports of a species) and...

A major barrier to advancing ornithology is the systemic exclusion of professionals from the Global South. A recent special dossier, Advances in Neotropical Ornithology, and a shortfalls analysis therein, unintentionally followed a long-standing pattern of highlighting individuals, knowledge, and views from the Global North, while largely omitting...

We report information from museum specimens, online databases, bibliographic records and field data that show colonization of the Argentinean provinces of Entre Ríos and Corrientes (Argentinean Mesopotamia) by Chaco Chachalacas (Ortalis canicollis). This colonization probably started during the first decades of the 20th Century, and this cracid is...

While bird vocalizations (produced by the syrinx) have been the focus of countless studies, mechanical sounds (produced by external body structures) have received much less attention. In particular, the evolutionary interplay between these two modes of acoustic communication remains largely unstudied. Here, we present the first species-level molecu...

Loud mechanical sounds with a communication role are called sonations. Male Subtropical Doraditos (Pseudocolopteryx acutipennis) exhibit five conspicuously modified primaries suspected of sonating. Here we 1) describe feather modifications, 2) describe three different territorial/aggressive contexts for these sounds: One-perch aerial displays, Two-...

Species limits in the Poospiza nigrorufa/whitii complex are not well understood. Three taxa formally described as species are now considered as subspecies (nigrorufa, whitii and wagneri) of a widespread species. The heavier nigrorufa has longer bill, tarsus and wings, is slightly dimorphic with males showing tawny rufous throat, breast and flanks,...

A new species of rheid, Opisthodactylus kirchneri, sp. nov., is erected on the basis of associated elements of both hind limbs from the late Miocene in northwestern Argentina. The new species extends the biochron of Opisthodactylus from early Miocene to late Miocene and its distribution from Patagonia to northwest Argentina. Cladistic analysis reco...

The Alder (Empidonax alnorum) and Willow (E. trailli) flycatchers are cryptic species, and their distribution outside the breeding season is poorly known, owing mostly to identification difficulties. Our new records suggestthat large numbers of Alder Flycatchers overwinter in rivers crossing the Chaco region and in the foothill forests of the Yunga...

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We analyzed all known records from Argentina of the Little Blue Heron (Egretta caerulea). We report the first breeding record and 13 new localities for the species, which is now known from 30 records from 28 localities in 10 provinces. Most records come from valleys and wetlands in northern and northwestern Argentina, where the species apparently b...

We present the first record of the Masked Tityra (Tityra semifasciata) in Argentina. We observed and photographed a male on 17 January 2008 in Parque Nacional Iguazú, Misiones. The bird was in the canopy, in a mixed-species flock that included the other two species in the genus, the Black-tailed Tityra (Tityra cayana) and the Black-crowned Tityra (...

We present the first record of the Masked Tityra (Tityra semifasciata) in Argentina. We observed and photographed a male on 17 January 2008 in Parque Nacional Iguazú, Misiones. The bird was in the canopy, in a mixed-species flock that included the other two species in the genus, the Black-tailed Tityra (Tityra cayana) and the Black-crowned Tityra (...

Este artículo no cuenta con un resumen.