Results 111 to 120 of about 229 (138)
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Evolution of dark colour in toucans (Ramphastidae): a case of molecular adaptation?
Journal of Evolutionary Biology, 2016AbstractIn the last decades, researchers have been able to determine the molecular basis of some phenotypes, to test for evidence of natural selection upon them, and to demonstrate that the same genes or genetic pathways can be associated with convergent traits.
Nicholas I Mundy +2 more
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Molecular Phylogenetics and Evolution, 2013
Andean uplift, Plio-Pleistocene climatic fluctuation, and river dynamics in the Amazon basin have all been implicated in the diversification of the South American avifauna. We reconstructed phylogenetic relationships in the genus Selenidera, which has served as a classic case of putative refugial speciation, and the closely related genus Andigena, to ...
Holly L Lutz +2 more
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Andean uplift, Plio-Pleistocene climatic fluctuation, and river dynamics in the Amazon basin have all been implicated in the diversification of the South American avifauna. We reconstructed phylogenetic relationships in the genus Selenidera, which has served as a classic case of putative refugial speciation, and the closely related genus Andigena, to ...
Holly L Lutz +2 more
exaly +3 more sources
Additional information on reproductive behavior of the Red-breasted Toucan, Ramphastos dicolorus (Aves: Piciformes: Ramphastidae) [PDF]
Biota Neotropica, 2019 Abstract: Ramphastidae is Family of secondary cavity-nesting birds that is endemic to the Neotropical region. Here we provide a comprehensive literature review of nest measurements, and new information on characteristics of the nest cavity, parental nest attendance, incubation and nestling period of the Red-breasted Toucan, Ramphastos dicolorus.
Daniel Fernandes Perrella
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Ramphastidae — toucans, aracaris, toucanets
2001Abstract All green generally with toucan bill of black and yellow, the only green toucan in its Central American range. In NW South America distinguished from other green toucanets by its black and yellow bill; south of Ecuador has blue or black throat, unlike other congeners there.
Lester L Short +2 more
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Alloplastic and Heteroplastic Bill Prostheses in 2 Ramphastidae Birds
Journal of Avian Medicine and Surgery, 2002A black-necked aracari (Pteroglossus aracaris) was presented for a beak injury in which one-fifth of the maxillary rhamphotheca was lost. A portion of a maxillary bill from a dead bird of the same species was used to replace the missing beak of the injured bird.
exaly +2 more sources
Caribbean Journal of Science, 2021
Although plumage color aberrations are common in birds, they often are difficult or even impossible to properly identify in the field. Even though some of these aberrations are common, including progressive greying, leucism, and albinism, there is confusion among the mechanisms responsible for each of the color aberrations.
Lucía I. López Umaña +1 more
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Although plumage color aberrations are common in birds, they often are difficult or even impossible to properly identify in the field. Even though some of these aberrations are common, including progressive greying, leucism, and albinism, there is confusion among the mechanisms responsible for each of the color aberrations.
Lucía I. López Umaña +1 more
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Über den schnabel der ramphastidae
Zeitschrift für Morphologie und Ökologie der Tiere, 1960Die Schnabel verschiedener Arten von Selenidera, Aulacorhynchus, Pteroglossus und Ramphastos werden in ihrer Form und Grose miteinander verglichen.
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