Results 1 to 10 of about 44,174 (139)

Body mass and geographic distribution determined the evolution of the wing flight-feather molt strategy in the Neornithes lineage [PDF]

open access: yesScientific Reports, 2021
The evolutionary history of many organisms is characterized by major changes in morphology and distribution. Specifically, alterations of body mass and geographic distribution may profoundly influence organismal life-history traits.
Yosef Kiat, Alex Slavenko, Nir Sapir
doaj   +2 more sources

Flight feather development: its early specialization during embryogenesis [PDF]

open access: yesZoological Letters, 2018
Background Flight feathers, a type of feather that is unique to extant/extinct birds and some non-avian dinosaurs, are the most evolutionally advanced type of feather.
Mao Kondo   +7 more
doaj   +2 more sources

Electrostatic adhesion mitigates aerodynamic losses from gap formations in feathered wings [PDF]

open access: yesCommunications Engineering
Birds morph the shape of their wings during flight to achieve impressive maneuverability and adapt to dynamic environments, such as cities and forests.
Kevin P. T. Haughn   +3 more
doaj   +2 more sources

Effects of Flight Restraint and Housing Conditions on Feather Corticosterone in White Storks Under Human Care [PDF]

open access: yesAnimals
Flight is part of the natural behaviours of most bird species, and as a consequence, flight restraint in zoos, even for those species that are primarily ground-dwelling, encounters increasing animal welfare concerns.
Frederike Liermann   +6 more
doaj   +2 more sources

Sexually dimorphic sail feathers in the Mandarin duck as a model for lifelong developmental modulation [PDF]

open access: yesScientific Reports
Developmental processes extend beyond embryogenesis to support lifelong tissue adaptations. Avian feather follicles, with their resident stem cells and capacity for cyclic regeneration, provide a dynamic model for postnatal tissue remodeling.
Pin-Chi Tang   +13 more
doaj   +2 more sources

Haste makes waste but condition matters: molt rate-feather quality trade-off in a sedentary songbird. [PDF]

open access: yesPLoS ONE, 2012
The trade-off between current and residual reproductive values is central to life history theory, although the possible mechanisms underlying this trade-off are largely unknown.
Csongor I Vágási   +5 more
doaj   +4 more sources

Allometry of the duration of flight feather molt in birds. [PDF]

open access: yesPLoS Biology, 2009
We used allometric scaling to explain why the regular replacement of the primary flight feathers requires disproportionately more time for large birds. Primary growth rate scales to mass (M) as M(0.171), whereas the summed length of the primaries scales ...
Sievert Rohwer   +3 more
doaj   +2 more sources

Avian-inspired embodied perception in biohybrid flapping-wing robotics [PDF]

open access: yesNature Communications
Avian feather intricate adaptable architecture to wing deformations has catalyzed interest in feathered flapping-wing aircraft with high maneuverability, agility, and stealth.
Qian Li   +3 more
doaj   +2 more sources

Analysis and comparison of protein secondary structures in the rachis of avian flight feathers [PDF]

open access: yesPeerJ, 2022
Avians have evolved many different modes of flying as well as various types of feathers for adapting to varied environments. However, the protein content and ratio of protein secondary structures (PSSs) in mature flight feathers are less understood ...
Pin-Yen Lin   +3 more
doaj   +2 more sources

Wing-feather loss in white-feathered laying hens decreases pectoralis thickness but does not increase risk of keel bone fracture

open access: yesRoyal Society Open Science, 2022
Feather loss in domestic chickens can occur due to wear and tear, disease or bird-to-bird pecking. Flight feather loss may decrease wing use, cause pectoral muscle loss and adversely impact the keel bone to which these muscles anchor.
Renée Garant   +6 more
doaj   +1 more source

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