Results 61 to 70 of about 2,486 (192)
Possible steps in the evolutionary development of bird navigation [PDF]
Hypotheses are presented to explain the evolutionary development of navigational ability in migratory birds. Areas of discussion to describe the possible techniques are: (1) sun compass, (2) bicoordinate navigation, (3) star compass, (4) wind cues, (5 ...
Bellrose, F. C.
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Орнитокомплексы карьеров и обрывов юга Украины и их вклад в биоразнообразие региона [PDF]
, 2009 Авифауна юга Украины включает свыше 330 видов птиц, что составляет 80 % видов птиц, известных в Украине. Разнообразие авифауны зависит от условий обитания и хозяйственной деятельности человека, разнообразия биотопов и их мозаичности.
Кошелев, В. А.
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The Wilson Journal of Ornithology, 2006 Abstract We report a specimen that appears to be a hybrid between Swainson's Hawk (Buteo swainsoni) and Rough-legged Hawk (B. lagopus), which, to our knowledge, is the first hybrid specimen for the genus. There are few reports of hybridization between Buteo species, most of which have been observations of interspecific nesting pairs.
WILLIAM S. CLARK, CHRISTOPHER C. WITT
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The shapes of bird beaks are highly controlled by nondietary factors [PDF]
, 2016 Bird beaks are textbook examples of ecological adaptation to diet, but their shapes are also controlled by genetic and developmental histories. To test the effects of these factors on the avian craniofacial skeleton, we conducted morphometric analyses on
Beecher +10 more
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Papageno down the ages : A study in fowling methods, with particular reference to the Palaeolithic of Western Europe [PDF]
, 2005 El hombre ha explotado las aves salvajes desde la época antigua, por lo menos desde el Paleolítico Medio. Sorprendentemente, las estrategias aquí presentadas han sobrevivido en sociedades y localidades muy diferentes.
Anne Eastham
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Pigment-specific relationships between feather corticosterone concentrations and sexual coloration [PDF]
, 2014 The adrenocortical stress response may divert energy away from sexual ornamentation, such that ornaments signal exposure or resistance to physiological stress.
Grunst, AS +4 more
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, 2020 In this study, the pre-release hematologic and biochemical parameters of wild buzzards in Turkey were evaluated after treatment. Having accurate reference hematologic and biochemical values is of critical importance in the assessment of patients, particularly in avian medicine.
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Tautonyms in Biology (Part 1) [PDF]
, 1996 One of my hobbies is collecting tautonyms--a harmless and inexpensive activity. Unlike rock-collecting, tautonym-collecting is clean, requires very little exertion, and only a small amount of storage space.
Long, Samuel S.
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La raccolta di avifauna italiana del naturalista "Andrea Fiori" (1854-1933) [PDF]
, 2015 Il Naturalista Andrea Fiori si interessò principalmente di ornitologia ed entomologia. La sua collezione di avifauna italiana è composta da 634 esemplari, raccolti per lo più nell’ultimo quarto del 1800, suddivisi in ben 271 specie ascrivibili a 151 ...
ANSALONI, Ivano, Imoeriale, Aldo
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