Results 51 to 60 of about 44,293 (251)

Specialized Feathers Produce Sonations During Flight in Columbina Ground Doves [PDF]

Integrative and Comparative Biology, 2020
Synopsis The shape of remiges (primary and secondary feathers) is constrained and stereotyped by the demands of flight, but members of the subfamily of New World ground doves (Peristerinae) possess many atypical remex shapes with which they produce sonations of alarm. Within the genus Columbina specifically, the seventh primary feathers (
Robert L Niese, Christopher J Clark, Bret W Tobalske   +2 more
openaire   +2 more sources

Comparative Neuromechanical Wing‐Actuation Architectures of Flapping Flight in Insects, Hummingbirds, and Robots

Advanced Intelligent Systems, EarlyView.
Natural fliers achieve remarkable aerial performance through diverse wing neuromechanical systems integrating actuation, sensing, and control. This study synthesizes neuromechanical architectures in insects and hummingbirds, identifying two key functional types‐Dual Neural‐Mechanical Oscillator and Neurally‐modulated Mechanical Oscillator‐ and ...
Suyash Agrawal, Jean‐Michel Mongeau, Bret W. Tobalske, Christopher Rahn, Bo Cheng   +4 more
wiley   +1 more source

Heat Stress and Gut Microbiome Dynamics in Poultry: Interplay, Consequences, and Mitigation Strategies

Animal Research and One Health, EarlyView.
Heat stress disrupts gut microbial balance in poultry, impairing nutrient absorption and immunity. This review outlines the interplay between thermal stress and microbiome dynamics and discusses integrative mitigation strategies, probiotics, phytogenics, cooling systems, and genetic adaptation to enhance poultry resilience.
O. E. Oke, A. I. Oni, O. A. Akosile, K. M. Oliyide, C. A. Ishola, M. O. Logunleko, O. A. Jimoh, C. P. Njoku, L. O. Fasasi, V. A. Uyanga   +9 more
wiley   +1 more source

Does feather corticosterone reflect individual quality or external stress in arctic-nesting migratory birds? [PDF]

PLoS ONE, 2013
The effects of environmental perturbations or stressors on individual states can be carried over to subsequent life stages and ultimately affect survival and reproduction. The concentration of corticosterone (CORT) in feathers is an integrated measure of
Pierre Legagneux, N Jane Harms, Gilles Gauthier, Olivier Chastel, H Grant Gilchrist, Gary Bortolotti, Joël Bêty, Catherine Soos   +7 more
doaj   +1 more source

Feather Corticosterone Measurements and Behavioral Observations in the Great White Pelican (Pelecanus onocrotalus) Living under Different Flight Restraint Conditions in German Zoos

Animals, 2021
The pinioning of birds was previously one of the most-accepted forms of mutilation in zoos. Despite a lack of knowledge on the effects of deflighting procedures with regard to the well-being of deflighted birds, pelicans are often reversibly deflighted ...
Gudrun Haase, Katrin Baumgartner, Lorenzo von Fersen, Roswitha Merle, Mechthild Wiegard, Hermann Will, Lukas Reese, Oriol Tallo-Parra, Annais Carbajal, Manel Lopez-Bejar, Christa Thöne-Reineke   +10 more
doaj   +1 more source

A guide to nestling development and aging in altricial passerines [PDF]

, 2007
Nestling growth and development studies have been a topic of interest for a greater part of the last century (Sutton 1935, Walkinshaw 1948) and continue to be of interest today. This is not surprising since studies on nestling growth can provide a wealth
Gardali, Thomas, Geupel, Geoffrey R., Gouse, Paula J., Jones, Stephanie L., Jongsomjit, Dennis   +4 more
core   +1 more source

Diet of bird‐like troodontid dinosaurs: synthesis of a contentious clade

Biological Reviews, EarlyView.
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, Case Vincent Miller, Michael Pittman   +2 more
wiley   +1 more source

Differences in molt timing, duration, and intensity between sexes in a Rufous-collared Sparrow population from central Chile

Journal of Field Ornithology
Molting is a fundamental life history stage for birds and involves the replacement of all (or some) feathers, depending on the molt cycle and strategy, mainly within the annual cycle.
Carlos E. Valeris-Chacín, Tomás F Zamorano-Escalona, Katherine R Chávez-Vásquez, Guyleine Rios-Robles, Mariana Klesse, Pablo A Cornejo-Escobar, Marcela Osorio, Rodrigo A Vásquez   +7 more
doaj   +1 more source

Barn owl feathers as biomonitors of mercury: sources of variation in sampling procedures. [PDF]

, 2015
Given their central role in mercury (Hg) excretion and suitability as reservoirs, bird feathers are useful Hg biomonitors. Nevertheless, the interpretation of Hg concentrations is still questioned as a result of a poor knowledge of feather physiology and
Coelho, C., Coelho, J.P., Lourenço, R., Marques, A., Pereira, E., Rabaça, J.E., Roque, I., Roulin, A.   +7 more
core   +2 more sources

Aromatic plants, nest bacterial diversity, and nestling condition in Corsican blue tits

Oikos, EarlyView.
According to the ‘nest protection hypothesis', some passerines incorporate fresh aromatic plants into their nests which reduce pathogens that can negatively affect nestlings. We experimentally evaluated the effect of five aromatic plant species on the nest bacterial microbiota of Corsican blue tits Cyanistes caeruleus.
Hélène Dion‐Phénix, Gabrielle Gingras, Claire Doutrelant, Anne Charmantier, Steven W. Kembel, Denis Réale   +5 more
wiley   +1 more source