Results 111 to 120 of about 16,518 (216)
Brazilian Journal of BiologyHummingbird communities tend to respond to variation in resources, having a positive relationship between abundance and diversity of food resources and the abundance and/or diversity of hummingbirds.
LC Rodrigues, M Rodrigues
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Field Flight Dynamics of Hummingbirds during Territory Encroachment and Defense.
PLoS ONE, 2015 Hummingbirds are known to defend food resources such as nectar sources from encroachment by competitors (including conspecifics). These competitive intraspecific interactions provide an opportunity to quantify the biomechanics of hummingbird flight ...
Katherine M Sholtis +2 more
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The changes in power requirements and muscle efficiency during elevated force production in the fruit fly Drosophila melanogaster [PDF]
, 1997 The limits of flight performance have been estimated in tethered Drosophila melanogaster by modulating power requirements in a 'virtual reality' flight arena.
Dickinson, Michael H. +1 more
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The Aerodynamics of Hummingbird Flight
, 2007 Hummingbirds fly with their wings almost fully extended during their entire wingbeat. This pattern, associated with having proportionally short humeral bones, long distal wing elements, and assumed to be an adaptation for extended hovering flight, has ...
Greenwalt C.H. +9 more
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Revista Mexicana de Biodiversidad, 2011 The global climatic change could cause, in some places, appearance of meteorological phenomena considered rare. If we understand the effect of these phenomena on birds we can understand how birds respond to weather changes. We report here the effect of a
Román Díaz-Valenzuela +1 more
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Limits to the salience of ultraviolet: Lessons from colour vision in bees and birds [PDF]
, 2001 Publisher version: http://jeb.biologists.org/content/204/14/2571/F1 ...
Chittka, L, Dyer, AG, Kevan, PG
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Description of a new genus and species of hummingbird from Panama [PDF]
, 1911 Since January, 1911, Mr. E. A. Goldman, of the Biological Survey, U.S.Department of Agriculture, has been detailed to the Smithsonian Biological Survey of the Panama Canal Zone to collect mammals and birds in the Canal Zone and adjacent parts of Panama...
Nelson, Edward W.
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Blue-Throated Hummingbird Song: A Pinnacle of Nonoscine Vocalizations
, 2000 Little is known about the structure and function of hummingbird vocalizations. We studied the vocalizations of Blue-throated Hummingbirds (Lampornis clemenciae) at two sites in southeastern Arizona. Songs were produced by males and females.
Ficken, Millicent S +3 more
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Pollination Ecology of Castilleja in Mount Rainer National Park [PDF]
, 1972 Author Institution: Department of Botany, University of Michigan, Ann Arbor, Michigan 48104The pollination ecology of four species of Castilleja was studied in the Berkeley Park- Yakima Park area of Mt.
Duffield, W. James
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Vocalizations distinguish the cryptic giant hummingbird species and clarify range limits
Journal of Field OrnithologyVocal traits are often essential for distinguishing phenotypically cryptic taxa. The hummingbird genus Patagona comprises two species that differ in important aspects of their ecology and physiology but that are near identical in plumage and morphology:
Bryce W Robinson +4 more
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