Results 41 to 50 of about 44,293 (251)
Scaling of bird wings and feathers for efficient flight [PDF]
Science Advances, 2019 Why and how do birds as small as a hummingbird and as large as a condor fly? Research reveals new secrets.
T. N. Sullivan, M. A. Meyers, E. Arzt
openaire +4 more sources
BMC Genomics, 2018 Background Feathers with complex and fine structure are hallmark avian integument appendages, which have contributed significantly to the survival and breeding for birds.
Jing Yang +3 more
doaj +1 more source
A forensic approach to understanding habitat use from stable isotope analysis of (avian) claw material [PDF]
, 2003 1. The potential of using stable isotope signatures of avian claws in order to infer diet and habitat use was investigated. 2. Highly significant relationships observed between stable carbon and nitrogen isotope ratios (13C, 15N) in the claws and ...
Bearhop, S +4 more
core +1 more source
Feather growth rate and mass in nearctic passerines with variablemigratory behavior and molt pattern [PDF]
, 2012 Bird species vary greatly in the duration of their annual complete feather molt. However, such variation is not well documented in birds from many biogeographic areas, which restricts our understanding of the diversification of molt strategies.
Barta Z. +8 more
core +2 more sources
Corvidae Feather Pulp and West Nile Virus Detection
Emerging Infectious Diseases, 2004 We evaluated cloacal swab, vascular pulp of flight feather, and kidney and spleen pool samples from carcasses of members of the family Corvidae as sources of West Nile virus (WNV). The cloacal swab, kidney and spleen pool, and feather pulp, respectively,
Douglas E. Docherty +3 more
doaj +1 more source
A new female-like morph of juvenile male Levant Sparrowhawk (Accipiter brevipes) – Sexual mimicry to avoid intra-specific predation? [PDF]
, 2015 In migrant Levant Sparrowhawk (Accipiter brevipes) at Eilat, Israel, we noted that juvenile males had two different morphs – the one described to date in literature; and a second, previously undescribed morph, with femalelike barring on the ...
Fornasari, Lorenzo, Yosef, Reuven
core +3 more sources
Moult of Flight Feathers in Darters (Anhingidae) [PDF]
Ardea, 2014 There is little information on flight feather moult in darters (Anhingidae). I used a combination of direct observations and photographs to confirm that the normal pattern of moult is to replace all remiges synchronously, but not all rectrices. I surmise that at least some rectrices are retained year-round because they are important for controlling ...
openaire +1 more source
Effects of owl-inspired leading-edge serrations on tandem wing aeroacoustics
AIP Advances, 2022 Leading-edge (LE) serrations on owls’ outermost remiges play a crucial role in the silent flight of owls. While the aeroacoustic characteristics of LE serrations have been widely studied using single feathers/airfoils, how they affect feather–feather ...
Jiaxin Rong, Hao Liu
doaj +1 more source
Advanced Science, EarlyView.Plants are promising materials for building sustainable and eco‐friendly robots due to their inherent multifunctionality, with actuation playing a crucial role. This article focuses on the physical movements of plants and, from the perspective of actuation characteristics, explores representative plant species and their behaviors, the current state of ...
Kazuya Murakami +8 more
wiley +1 more source
Optimális éves viselkedési modellek: út a fiziológiától a populációkig? = Optimal annual routines: a path from physiology to populations? [PDF]
, 2009 A pályázat fő célja annak kiderítése volt, hogy a különböző állapotváltozók hogyan befolyásolják az optimális viselkedést, speciálisan a hogyan befolyásolják a fő életmenet események időzítését az éves cikluson belül. E cél elérése érdekében több modellt
Alasdair, I. Houston +3 more
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