Results 41 to 50 of about 322 (120)
Journal of Morphology, Volume 285, Issue 6, June 2024.We describe the nearly complete digital endocasts of the brain and bony labyrinth of the neotype specimen of Lithornis vulturinus, a palaeognathous bird from the early Eocene of Europe. Lithornis may provide the clearest insights to date into the neuroanatomy of the ancestral crown bird, combining an ancestrally unflexed brain with a caudally oriented ...
Klara E. Widrig +2 more
wiley +1 more source
Malófagos (Phthiraptera, Amblycera, Ischnocera) em aves cativas no sudeste do Brasil [PDF]
, 2009 Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Ixodides. Referência Nacional em Vetores das Riquétsias. Rio de Janeiro, RJ. Brasil.Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Ixodides.
Silva, Salete Oliveira da +3 more
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Global diversity and adaptations of avian eggshell thickness indices
Ibis, Volume 166, Issue 2, Page 534-550, April 2024.The amniote eggshell is a fundamental aspect of the embryo life‐support system, protecting it from UV light, microbes and mechanical damage, while regulating gas exchange and providing calcium for growth. The thickness of eggshells is highly diverse across modern birds and influences multiple eggshell functions, yet the selective pressures driving ...
Marie R. G. Attard, Steven J. Portugal
wiley +1 more source
BioEssays, Volume 46, Issue 1, January 2024.We propose that fovea formation involves dynamic and asymmetric changes in ocular shape in humans and other species with foveated eyes. Abstract The human fovea is known for its distinctive pit‐like appearance, which results from the displacement of retinal layers superficial to the photoreceptors cells.
Ashley M. Rasys +5 more
wiley +1 more source
Un juvenil fósil de Pterocnemia pennata d'Orbigny (Aves, Rheiformes): diferencias ontogenéticas postnatales [PDF]
, 2010 Durante la ontogenia post-natal de las aves la morfología de los huesos del miembro posterior es distinta a la del adulto. Esto es especialmente notorio en los extremos proximales y particularmente en las epífisis del tibiotarso y tarsometatarso. En este
Degrange, Federico Javier +2 more
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Genetic diversity of Chlamydia among captive birds from central Argentina [PDF]
, 2015 To study the occurrence of Chlamydia spp. and their genetic diversity, we analysed 793 cloacal swabs from 12 avian orders, including 76 genera, obtained from 80 species of asymptomatic wild and captive birds that were examined with conventional nested ...
Ré, Viviana Elizabeth +6 more
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Long-term interactions between avifauna and humans in the southern Andean Puna during the Late-Holocene [PDF]
By comparing the present and past avifauna, we investigate the human practices that involved the knowledge and interaction with birds during the Late-Holocene in Puna Austral Argentina.
Velardez Fresia, María Belén +1 more
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Morphology of cells peripheral blood in rheas (Rhea americana) [PDF]
, 2009 A ema (Rhea americana) é uma ave sul-americana do grupo das ratitas, da ordem Rheiforme, freqüentemente explorada com fins econômicos, como pecuária alternativa em países europeus e sul-americanos.
Almeida, Ezequiel Cardozo Saraiva de +4 more
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QUALITATIVE PATTERNS OF MORPHOLOGICAL CHARACTERIZATION IN THE FEATHERS OF FLYING AND FLIGHTLESS BIRDS [PDF]
, 2020 Feathers are the vital structure of the outer covering and flight surface of all modern birds. Feathers are branched structures consisting of β-keratin—a rigid protein material formed by pleated β sheets—with a hollow central shaft.
NAJEEB, S. +5 more
core +1 more source
Spatial distribution of feather mites (Astigmata: Analgoidea) on the plumage of passerine birds from the territory of South Dobrudzha, Bulgaria [PDF]
, 2019 Feather mites (Astigmata: Pterolichoidea, Analgoidea) are permanent ectosymbionts of birds, found from all avian orders except Rheiformes (Stefan et al. 2015). The feather mites' spatial distribution on the plumage depends on the morphology and structure
Kolarova, Nevena +3 more
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