Results 101 to 110 of about 44,293 (251)

The Impact of Avian Haemosporidian Infection on Feather Quality and Feather Growth Rate of Migratory Passerines

Animals
Bird feathers have several functions, including flight, insulation, communication, and camouflage. Since feathers degrade over time, birds need to moult regularly to maintain these functions. However, environmental factors like food scarcity, stress, and
Carlos Mora-Rubio, Luz Garcia-Longoria, Martina Ferraguti, Sergio Magallanes, João T. Cruz, Florentino de Lope, Alfonso Marzal   +6 more
doaj   +1 more source

Avian wing proportions and flight styles: first step towards predicting the flight modes of mesozoic birds.

PLoS ONE, 2011
We investigated the relationship between wing element proportions and flight mode in a dataset of living avian species to provide a framework for making basic estimates of the range of flight styles evolved by Mesozoic birds.
Xia Wang, Alistair J McGowan, Gareth J Dyke   +2 more
doaj   +1 more source

Habitat imprinting in breeding territory selection of a long‐lived bird of prey

Journal of Animal Ecology, EarlyView.
A unique long‐term dataset has allowed this study of an important habitat selection mechanism, habitat imprinting, in a species which is typically extremely challenging to study. It gives us better understanding of the role of early experience in selection of breeding sites in long‐lived species with high breeding site fidelity.
Ida Penttinen, Carina Nebel, Toni Laaksonen   +2 more
wiley   +1 more source

Flight feather moult in Western Marsh Harriers during autumn migration

Avian Research, 2019
Background Most of long-distance migratory raptors suspend moult during migration but detailed information is patchy for most of the Palearctic species.
Juan Ramírez, Michele Panuccio
doaj   +1 more source

Optimális vedlési stratégiák = Optimal moult strategies [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, Barta, Zoltán, Lendvai, Ádám Zoltán, McNamara, John M., Pap, Péter László   +4 more
core  

Depigmented wing patch size is a condition-dependent indicator of viability in male collared flycatchers [PDF]

, 2003
Honesty of sexual advertisement is thought to be the result of signalling costs. Because production costs of depigmented plumage patches are probably very low, their role as honest signals of individual quality has been questioned. Costs of bearing these
Garamszegi, László Zsolt, Hegyi, Gergely, Török, János   +2 more
core   +1 more source

No egalitarianism in the Wa hills: relative commensuration in kinship, sacrifice, and war Nul égalitarisme dans les hautes terres Wa : commensuration relative dans la parenté, le sacrifice et la guerre

Journal of the Royal Anthropological Institute, EarlyView.
The autonomy of the United Wa State Army of Myanmar today is said to be based on the egalitarianism of Wa communities in the past. The analysis of commensuration in kinship, sacrifice, and war challenges these portrayals of autonomy and egalitarianism.
Hans Steinmüller
wiley   +1 more source

Conserved regulatory switches for the transition from natal down to juvenile feather in birds

Nature Communications
The transition from natal downs for heat conservation to juvenile feathers for simple flight is a remarkable environmental adaptation process in avian evolution.
Chih-Kuan Chen, Yao-Ming Chang, Ting-Xin Jiang, ZhiCao Yue, Tzu-Yu Liu, Jiayi Lu, Zhou Yu, Jinn-Jy Lin, Trieu-Duc Vu, Tao-Yu Huang, Hans I-Chen Harn, Chen Siang Ng, Ping Wu, Cheng-Ming Chuong, Wen‐Hsiung Li   +14 more
doaj   +1 more source

The predatory behavior of ants: an impressive panoply of morphological adaptations

Insect Science, EarlyView.
This review focuses on predation in ants, showing the wide diversity of cases from solitary foraging to group hunting tactics, as well as the evolution of mandible shape frequently adapted to capture specific prey. Although most ants are generalist feeders, finding their sugary substances directly on plants or indirectly via sap‐sucking insects, some ...
Alain Dejean, Xim Cerdá, Jérôme Orivel, Frédéric Azémar, Alexander L. Wild, Bruno Corbara, Axel Touchard   +6 more
wiley   +1 more source

Sexual dimorphism and population differences in structural properties of barn swallow (Hirundo rustica) wing and tail feathers [PDF]

, 2017
This is an open access article distributed under the terms of the Creative Commons Attribution License.-- et al.Sexual selection and aerodynamic forces affecting structural properties of the flight feathers of birds are poorly understood.
Aparicio, José Miguel, Pap, Péter L.
core   +1 more source