Results 131 to 140 of about 5,511 (168)

[Birds' sense of direction].

Duodecim; laaketieteellinen aikakauskirja, 2016
Birds utilize several distinct sensory systems in a flexible manner in their navigation. When navigating with the help of landmarks, location of the sun and stars, or polarization image of the dome of the sky, they resort to vision. The significance of olfaction in long-range navigation has been under debate, even though its significance in local ...
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The Water Framework Directive and the Habitats and Birds Directives

2009
The Water Framework Directive not only describes a new method to classify and enhance the status of waters in the UK, it also provides new obligations, a new management framework and additional monitoring requirements for water dependent Natura 2000 protected areas. Most importantly, it requires the achievement of any standards and objectives for these
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Blackhead Disease in Turkeys: Direct Transmission of Histomonas meleagridis from Bird to Bird in a Laboratory Model

Avian Diseases, 2005
The spread of Histomonas meleagridis infections through groups of turkeys in the absence of the cecal worm vector (Heterakis gallinarum) was studied in a battery cage model. Battery-reared poults were exposed at 2 wk of age by commingling with infected birds into cages that had the floor lined with paper.
L R, McDougald, L, Fuller
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Evaluating theories of bird song learning: implications for future directions

Journal of Comparative Physiology A: Sensory, Neural, and Behavioral Physiology, 2002
Studies of birdsong learning have stimulated extensive hypotheses at all levels of behavioral and physiological organization. This hypothesis building is valuable for the field and is consistent with the remarkable range of issues that can be rigorously addressed in this system.
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Directional selection on directional asymmetry: testes size and secondary sexual characters in birds

Proceedings of the Royal Society of London. Series B: Biological Sciences, 1994
A standard example of directional asymmetry with one side of the body having a larger character value than the other is testes size in many vertebrates. The relation between directional asymmetry in testes size and the expression of secondary sexual characters (a measure of phenotypic quality) in two bird species, the barn swallow, Hirundo rustica, and
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Transoceanic bird migration: Evidence for detection of wind direction

Behavioral Ecology and Sociobiology, 1980
Further analysis of radar tracks of migrating birds over the Atlantic Ocean (Larkin et al., 1979) indicates that birds sometimes fly at lower air speeds when winds are in the direction of flight than in crosswinds or head winds. The birds are able to estimate wind direction over open ocean by a mechanism which is presently open to speculation.
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The birds have nested: design direction for informal settlements

URBAN DESIGN International, 1996
In most cities of the developing world, informal settlements are both the most common residential context and the dominant means of obtaining housing. Since many of these cities are rapidly approaching ‘megacity’ status, the issue of informal settlements becomes striking in its enormity.
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Two-birds-one-stone: multifunctional supercapacitors beyond traditional energy storage

Energy and Environmental Science, 2021
Yang Zhou, Jinyuan Yang, Zheng Bo
exaly  

The Birds Directive

Review of European Community & International Environmental Law, 1997
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Directional Selection and Clutch Size in Birds

The American Naturalist, 1990
Fred Cooke, Peter D. Taylor, Charles M. Francis, Robert F. Rockwell   +3 more
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