Results 231 to 240 of about 30,033 (263)
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Science, 2003
Island ecosystems are great places to view evolution in action. In their Perspective, Altshuler and Clark discuss studies on the islands of the Lesser Antilles (Temeles and Kress) that reveal a striking morphological coevolution of the beaks of male and female hummingbirds and the Heliconia flowers on which they feed.
Christopher J. Clark +1 more
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Island ecosystems are great places to view evolution in action. In their Perspective, Altshuler and Clark discuss studies on the islands of the Lesser Antilles (Temeles and Kress) that reveal a striking morphological coevolution of the beaks of male and female hummingbirds and the Heliconia flowers on which they feed.
Christopher J. Clark +1 more
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Adaptive thermogenesis in hummingbirds
Journal of Experimental Biology, 2002SUMMARY The occurrence of non-shivering thermogenesis in birds has long been a controversial issue. Although birds are endothermic vertebrates, sharing with mammals (placental mammals and marsupials) a common ancestor, they do not possess brown adipose tissue or a similar type of tissue, unlike their mammalian counterparts.
Antonio C. Bianco +3 more
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1983
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Krüger, K. +2 more
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(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Krüger, K. +2 more
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2019
This manuscript is a collection of poems written or revised during the two years of the inaugural Dominican University of California Master of Fine Arts program in creative writing. The poems are mostly free verse with a few formal or hybrid forms and represent my quest to combine narrative with lyric elements to reflect the life of a physician poet ...
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This manuscript is a collection of poems written or revised during the two years of the inaugural Dominican University of California Master of Fine Arts program in creative writing. The poems are mostly free verse with a few formal or hybrid forms and represent my quest to combine narrative with lyric elements to reflect the life of a physician poet ...
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The Wilson Journal of Ornithology, 2011
Abstract We report a Great-billed Hermit (Phaethornis malaris) with three testes, a condition known as triorchidism. This is the first case to our knowledge of triorchidism in Neoaves, the clade that contains ∼95% of avian species diversity. Triorchidism is inferred to be an exceptionally rare congenital abnormality in wild birds with developmental ...
Christopher C. Witt, Emil Bautista
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Abstract We report a Great-billed Hermit (Phaethornis malaris) with three testes, a condition known as triorchidism. This is the first case to our knowledge of triorchidism in Neoaves, the clade that contains ∼95% of avian species diversity. Triorchidism is inferred to be an exceptionally rare congenital abnormality in wild birds with developmental ...
Christopher C. Witt, Emil Bautista
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The Wordsworth Circle, 2004
In the bird gallery of The Natural History Museum in London there is a nineteenth-century glass cabinet the size of a circus car that may have once belonged to William Bullock, the London Museum curator. The cabinet is large but easy to overlook--from a distance it looks like a neglected herbarium, one in which the foliage has been allowed to go brown ...
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In the bird gallery of The Natural History Museum in London there is a nineteenth-century glass cabinet the size of a circus car that may have once belonged to William Bullock, the London Museum curator. The cabinet is large but easy to overlook--from a distance it looks like a neglected herbarium, one in which the foliage has been allowed to go brown ...
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1924
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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Simultaneous Multiple Nests of Calliope Hummingbird and Rufous Hummingbird
The Wilson Journal of Ornithology, 2012Abstract We report the first cases of simultaneous double brooding known for Calliope Hummingbird (Stellula calliope) and Rufous Hummingbird (Selasphorus rufus) from observations of two females in Montana. Each female laid two eggs and started incubating while feeding large young in a nearby nest, and each successfully fledged young from both nesting ...
Gigi Batchelder +3 more
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ACM SIGGRAPH 2020 Computer Animation Festival, 2020
Framestore Pictures and Director Murray Butler have produced and directed a whole charm of hummingbirds for the new commercial for Britvic-owned drinks brand Purdey's. It produced the fully CG photoreal film for advertising agency VCCP, which is an homage to nature and wildlife documentaries, reflecting the natural ingredients found in Purdey's ...
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Framestore Pictures and Director Murray Butler have produced and directed a whole charm of hummingbirds for the new commercial for Britvic-owned drinks brand Purdey's. It produced the fully CG photoreal film for advertising agency VCCP, which is an homage to nature and wildlife documentaries, reflecting the natural ingredients found in Purdey's ...
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Notes on the Brain of the Hummingbird
Archives of Neurology, 1962In 1959, shortly before his untimely death, Dr. Walker van Riper sent me the head of a broad-tailed hummingbird (Selasphorus platycercus). We had been corresponding about the sense of smell in birds, and he wrote me about his observations on wild birds of this species in Colorado. He designed an ingenious set of experiments in which he fed a population
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