Results 21 to 30 of about 1,454 (111)
Esternon de aves Chilenas: struthioniformes a piciformes
Boletín Museo Nacional de Historia Natural, 2011 El esternón es una estructura de peculiar desarrollo en las aves y presenta una combinación de caracteres que puede variar de acuerdo al modo de vida de cada especie; este trabajo describe y analiza el esternón de 25 órdenes, 47 familias y 112 géneros de aves que habitan en Chile.
Marina L. Lemus, Juan C. Torres-Mura
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Morphology of the extraocular muscles (m. bulbi) in the pre-hatchling and post-hatchling african black ostriches (struthio camelus domesticus L., 1758) (Aves: Struthioniformes) [PDF]
Acta Biologica Hungarica, 2018 The aim of the study was to describe the morphology and the development of the extraocular muscles (EOMs) in the pre-hatchling and post-hatchling African black ostrich. The study involved 50 birds aged between 28 days and 3 years. The EOMs were analyzed morphologically with respect to the location and length of the straight and oblique muscles and the ...
Klećkowska-Nawrot, Joanna +3 more
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Morphological study of the upper, lower and third eyelids in the African black ostrich (Struthio camelus camelusL., 1758) (Aves: Struthioniformes) during the embryonic and postnatal period [PDF]
Italian Journal of Zoology, 2016 AbstractThe upper, lower and third eyelids are accessory organs of the eye. The aim of this study was to describe the development of the upper, lower and third eyelids in ostriches in the embryonic and postnatal period and to characterise the conjunctiva-associated lymphoid tissue (CALT) in the eyelids.
Joanna Klećkowska-Nawrot +2 more
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Diet of bird‐like troodontid dinosaurs: synthesis of a contentious clade
Biological Reviews, Volume 101, Issue 4, Page 1760-1778, August 2026.ABSTRACT Troodontidae is a clade of small‐to medium‐sized maniraptoran theropods that mainly lived in Laurasia (modern Asia, North America and Europe) during the Jurassic and Cretaceous periods and are believed to have had a variety of diets. The uniqueness of troodontid teeth suggests that they diverged from the typical flesh‐based diet of non‐avian ...
Yui Chi Fan +2 more
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Veterinary Record Case Reports, Volume 14, Issue 2, May 2026.SUMMARY A 17‐year‐old, 24‐kg, female greater rhea (Rhea americana) presented with an acute onset of left wing droop. Clinical examination and radiographs revealed an open, simple, displaced, short‐oblique diaphyseal fracture of the distal third of the left humerus.
Pierre Huberdeau +6 more
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Diversity and Distributions, Volume 32, Issue 5, May 2026.ABSTRACT Introduction and Aim Spatiotemporal and taxonomic sampling bias in biodiversity occurrence data poses critical challenges for robust ecological inference, species distribution models (SDMs), and conservation planning. Despite the exponential growth in global biodiversity records over recent decades, these biases persist.
Ahmed El‐Gabbas
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Wildlife Biology, Volume 2026, Issue 1, January 2026.During the 18th and 19th centuries, bird feathers (class: Aves) were harvested from wild populations and sold globally in enormous quantities to meet the rising demand of the fashion industry. Although many laws now prevent similar widescale harvest, there is a paucity of studies on the trade that has continued to occur since the 20th century.
Jasmin Broadbridge +2 more
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Sexual dichromatism increases with altitude in birds with ultraviolet sensitive vision
Journal of Zoology, Volume 326, Issue 1, Page 77-88, May 2025.Previous work has shown a significant relationship between sexual dichromatism and altitude in birds, however, this work was focused on either a small subset of avian diversity or used human scoring to assess sexual dichromatism. In this study, we compared human scoring and spectrophotometry scoring to study this relationship and found no significant ...
D. A. Villar +2 more
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The Importance of Olfaction for Mixed Paternity in Birds
Ecology and Evolution, Volume 15, Issue 1, January 2025.Olfaction can help individuals finding genetically compatible mates in many animals, while high levels of mixed paternity may reflect a reduced ability to evaluate a mate's profile against their own before mating. We tested this hypothesis by matching estimates of olfactory ability with mixed paternity for a broad range of bird species.
Charlotta Kvarnemo +3 more
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The Lithornithiformes (Aves) from the early Eocene London Clay of Walton‐on‐the‐Naze (Essex, UK)
Papers in Palaeontology, Volume 11, Issue 1, January/February 2025.Abstract We describe multiple partial skeletons and isolated bones of the palaeognathous Lithornithiformes from the early Eocene London Clay of Walton‐on‐the‐Naze (Essex, UK). The well‐preserved specimens are assigned to at least four species of the taxa Lithornis and Pseudocrypturus. Two species of Lithornis are identified as L. nasi and L.
Gerald Mayr, Andrew C. Kitchener
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