Results 21 to 30 of about 44,293 (251)
Water bathing alters the speed-accuracy trade-off of escape flights in European starlings [PDF]
, 2009 Birds of most species regularly bathe in water, but the function of this behaviour is unknown. We tested the hypothesis that water bathing is important in feather maintenance, and hence should enhance flight performance. We manipulated European starlings'
Asher, L +3 more
core +2 more sources
Aerodynamic performance of the feathered dinosaur Microraptor and the evolution of feathered flight [PDF]
Nature Communications, 2013 Understanding the aerodynamic performance of feathered, non-avialan dinosaurs is critical to reconstructing the evolution of bird flight. Here we show that the Early Cretaceous five-winged paravian Microraptor is most stable when gliding at high-lift coefficients (low lift/drag ratios).
Dyke, Gareth +5 more
openaire +3 more sources
Validating the use of intrinsic markers in body feathers to identify inter-individual differences in non-breeding areas of northern fulmars [PDF]
, 2016 Acknowledgments We thank Claire Deacon, Gareth Norton and Andrea Raab for help with laboratory work at the University of Aberdeen, and Barry Thornton and Gillian Martin for running stable isotope analysis at the James Hutton Institute.
Graham, Isla M. +4 more
core +2 more sources
Feather holes and flight performance in the barn swallow Hirundo rustica
Animal Cells and Systems, 2018 Feather holes are small (0.5–1 mm in diameter) deformities that appear on the vanes of flight feathers. Such deformities were found in many bird species, including galliforms and passerines. Holey flight feathers may be more permeable to air, which could
Piotr Matyjasiak +4 more
doaj +1 more source
Materials & Design, 2020 The feather of a bird consists of barbs which again comprise numerous barbules with micro-hooklets. This hierarchically organized feather structure provides a smooth vane to bear the load from the airflow; however, the feather vane is vulnerable to ...
Jing-Shan Zhao +4 more
doaj +1 more source
Building a Bird: Musculoskeletal Modeling and Simulation of Wing-Assisted Incline Running during Avian Ontogeny [PDF]
, 2018 Flapping flight is the most power-demanding mode of locomotion, associated with a suite of anatomical specializations in extant adult birds. In contrast, many developing birds use their forelimbs to negotiate environments long before acquiring “flight ...
Ashley M. Heers +4 more
core +3 more sources
Shock and Vibration, 2014 Flight feather shaft of long-eared owl is characterized by a three-parameter model for linear viscoelastic solids to reveal its damping ability. Uniaxial tensile tests of the long-eared owl, pigeon, and golden eagle flight feather shaft specimens were ...
Jia-li Gao +4 more
doaj +1 more source
An investigation into the detection of latent marks on the feathers and eggs of birds of prey [PDF]
, 2014 There are numerous enhancement techniques (physical and chemical) which have been developed for the successful visualisation of latent fingermarks. Nonetheless, problems arise when latent fingermarks require enhancement on difficult surfaces such as ...
Farrugia, Kevin J. +2 more
core +4 more sources
Frontiers in Ecology and Evolution, 2023 Feather quality in birds is considered an honest signal of individual health as feather appearance and function depend on an individual’s ability to maintain them.
Jennifer L. Ellis +6 more
doaj +1 more source
Using field photography to study avian moult [PDF]
, 2017 Methods to obtain moult data from wild birds have not changed much over the last century and most studies still depend on checking museum specimens or capturing birds.
Furness, Robert W. +2 more
core +1 more source