inferno 发表于 2025-3-23 12:48:44
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Book 1999. Topics cover the spectrum from themolecular level of organization to population biology and communityecology. The series seeks especially to review (1) fields in which anabundant recent literature will benefit from synthesis andorganization, or (2) newly emerging fields that are gainingrecognition无聊的人 发表于 2025-3-24 02:13:11
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Book 1999 as the result of recent discoveries or shifts inperspective, or (3) fields in which students of vertebrates maybenefit from comparisons of birds with other classes. All chapters areinvited, and authors are chosen for their leadership in the subjectsunder review.Pessary 发表于 2025-3-24 09:46:42
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A Search for Environmental Cues Used by Birds in Survival of Cold Winters,eside in continental climates at higher latitudes. In that season, shortened days, diminishing and perhaps unpredictable food supplies, and inclement weather all present special challenges for foraging and acquiring energy. Caching of food assists some species in meeting these challenges (PravosudovTHE 发表于 2025-3-24 16:18:56
Differential Migration Revisited,ration that has long intrigued biologists is the occurrence of differential migration, in which distance traveled differs between portions of a population. For example, in the eastern United States female Dark-eyed Juncos (.) migrate farther into the winter range than males (Ketterson and Nolan, 197Ganglion 发表于 2025-3-24 19:09:17
Grit Use by Birds,he gizzards of most birds that eat plant parts (Meinertzhagen, 1964; Farner, 1960) and of many that eat invertebrates (Mayoh and Zach, 1986; Barrentine, 1980; Peterson and Ellarson, 1977; Jenkinson and Mengel, 1970; Barlow .., 1963). Many studies have shown that, among avian species that use grit, m分贝 发表于 2025-3-25 02:47:37
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