Rufous Hummingbird at Jasper, Alberta
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چکیده
منابع مشابه
Corticosterone and nocturnal torpor in the rufous hummingbird (Selasphorus rufus).
Three experiments were designed to investigate whether corticosterone (CORT), known to have a role in restoration of energy homeostasis, regulates nocturnal torpor, an energy conservation state used by some small mammals and birds to offset environmental challenges to energy balance. In two experiments, one during autumn migration and one during early spring molt, captive rufous hummingbirds (S...
متن کاملForaging ability of rufous hummingbirds on hummingbird flowers and hawkmoth flowers.
We examine the suitability of ornithophilous flowers and sphingophilous flowers in Ipompsis and Aquilegia for nectar foraging by the hummingbird Selasphorus rufus. In S. rufus, bill length averages 18.9 mm in females and 17.3 mm in males. Maximal tongue extension approximates bill length, suggesting that birds can feed from floral tubes up to 33.5 mm in length. However, their ability to do so i...
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Hummingbird submitted ranked result sets for the topic relevance task of the TREC 2001 Web Track (10GB of web data) and for the monolingual Arabic task of the TREC 2001 Cross-Language Track (869MB of Arabic news data). SearchServer's Intuitive Searching tied or exceeded the median Precision@10 score in 46 of the 50 web queries. For the web queries, enabling SearchServer's document length norma...
متن کاملVocalizations and Associated Behaviors of the Sombre Hummingbird (aphantochroa Cirrhochloris) and the Rufous-breasted Hermit (glaucis Hirsutus).
Vocal behavior in tropical hummingbirds is a new area of study. Here, we present findings on the vocalizations and associated behaviors of two species: Sombre Hummingbird (Aphantochroa cirrhochloris) and Rufous-breasted Hermit (Glaucis hirsutus). These are the only hummingbirds in which the brain areas activated by singing have been demonstrated. They are also among the basal species of their r...
متن کاملHummingbird Ltd.
The Network File System (NFS) version 4 is a distributed filesystem protocol which owes heritage to NFS protocol version 2, RFC 1094, and version 3, RFC 1813. Unlike earlier versions, the NFS version 4 protocol supports traditional file access while integrating support for file locking and the mount protocol. In addition, support for strong security (and its negotiation), compound operations, c...
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ژورنال
عنوان ژورنال: Blue Jay
سال: 1970
ISSN: 2562-5667,0006-5099
DOI: 10.29173/bluejay3637