Crown group (neornithine birds) exhibit a great variation in the morphology of the
hypotarsus, a structure on the proximal end of the tarsometatarsus, which guides the …

Geographic range shifts can cause secondary contact and hybridization between closely
related species, revealing mechanisms of species formation and integrity. These dynamics …

The fossil record of birds from Antarctica is concentrated in the James Ross Basin, located in
north-east of the Antarctic Peninsula. Birds are here represented by an extensive Paleogene …

High disparity among avian forelimb and hind limb segments in crown birds relative to non-
avialan theropod dinosaurs, potentially driven by the origin of separate forelimb and hind …

Patagifer Dietz, 1909 is a small genus of echinostomatids, with 12 recognized species,
mostly parasitising threskiornithid birds, distributed worldwide. In the current research, adult …

El ibis de la puna Plegadis ridgwayi, es una especie de Threskiornithidae que habita
humedales andinos y realiza migraciones altitudinales hacia la costa. Datos propios, de …

In several taxa of Neornithes (crown group birds), the lacrimal/ectethmoid complex exhibits
small bones, the comparative osteology of which is poorly studied. Some of these ossicles …

We present a complete, time-scaled, evolutionary tree of the world's bird species. This tree
unites phylogenetic estimates for 9,239 species from 262 studies published between 1990 …

Abstract The Andean Ibis (Theristicus branickii) of the highland grasslands of Ecuador, Peru,
and Bolivia is listed globally as Near Threatened and Critically Endangered in Ecuador. The …

The Scarlet Ibis (Eudocimus ruber) and White Ibis (Eudocimus albus) are often classified as
separate species, but differing scientific opinions exist regarding the taxonomic status of …