Results 11 to 20 of about 16,222 (256)
Niche–trait relationships at individual and population level in three co‐occurring passerine species
Ecology and Evolution, 2021 The niche variation hypothesis (NVH) predicts that populations with wider niches exhibit greater morphological variation through increased interindividual differences in both niche and morphology.
Pei‐Jen L. Shaner +2 more
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New Information on the Keratinous Beak of Confuciusornis (Aves: Pygostylia) From Two New Specimens
Frontiers in Earth Science, 2020 The keratinous beak is inferred to have evolved multiple times in the Archosauria and in Aves. Unfortunately, this feature rarely preserves in the fossil record.
Xiaoting Zheng +11 more
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Ecology and Evolution, 2022 In the French Mediterranean plain, the northern extreme of its native range, the Iberian gray shrike, Lanius meridionalis, predominantly feeds on arthropods. Its type of loral plumage plays a key role in protecting its eyes while transporting large prey.
Frédéric Labouyrie
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The effect of infrared beak treatment on the welfare of turkeys reared to 12 weeks of age
Poultry Science, 2022 : This study aimed to determine the effects of infrared beak treatment on the behavior and welfare of male and female turkeys reared to 12 wk of age. To do this, poults (236 males and 324 females) were assigned to one of 2 beak treatments: infrared beak ...
S. Struthers +7 more
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Trans‐sinus fixation for correction of deviation of the gnathotheca in a hawk (Caracara plancus)
Veterinary Medicine and Science, 2022 Introduction For birds of prey, the integrity of the beak is extremely important for defence, hygiene, socialization and especially, feeding. This paper describes successful trans‐sinus fixation of a lateral deviation of the mandible in a hawk (Caracara ...
Maria Ângela Panelli Marchio +3 more
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The True Identity of Putative Tooth Alveoli in a Cenozoic Crown Bird, the Gastornithid Omorhamphus
Frontiers in Earth Science, 2021 All extant birds are toothless, and recent molecular evidence suggests that edentulism in extant birds is the product of a single evolutionary transition to toothlessness on the line to crown birds in the Cretaceous.
Antoine Louchart +3 more
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An analysis of beak shape variation in two ages of domestic turkeys (Meleagris gallopavo) using landmark-based geometric morphometrics. [PDF]
PLoS ONE, 2017 The objective of this study was to assess beak shape variation in domestic turkeys (Meleagris gallopavo) and determine the effects of age, sex, and beak size on beak shape variation using geometric morphometrics.
Hillary A Dalton +4 more
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Beak Morphology Variation of Uroteuthis edulis Based on Geometric Morphometrics
Progress in Fishery Sciences, 2023 The study of ontogenetic organisms can help us fully understand the law of morphology change and the correlation between the function and morphology of the structure of organisms. To explore the pattern of growth change in U. edulis beak, this study used
Chao WANG, Zhou FANG, Xinjun CHEN
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JVS - Vascular Science, 2022 Objective: Formation of a bird-beak configuration in thoracic endovascular aortic repair (TEVAR) has been shown to be influenced by various factors. However, the main cause of bird-beak formation remains poorly understood.
Negin Shahbazian, MASc +3 more
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