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Article
Tara L. Imlay, Auteur ; Rolanda J. Steenweg, Auteur ; Belen Garcia-Perez, Auteur ; Keith A. Hobson, Auteur ; Sievert Rohwer, AuteurMolt is energetically demanding and various molt strategies (i.e., molt series, duration, intensity, timing, and location) have evolved to reduce the negative fitness consequences of this process. As such, molt varies considerably among species.[...]
Article
David H. Ellis, Auteur ; Vanya G. Rohwer, Auteur ; Sievert Rohwer, AuteurBecause many species of large birds must remain capable of flight during moult and breeding, complete replacement of all flight feathers often takes two or more years, with the result that their plumage normally includes many faded, worn and som[...]
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Paul W. Ewald ; Sievert Rohwer 1980Behavioral Ecology and Sociobiology, 7(4)[During the nonbreeding season, adult Anna and black-chinned hummingbirds (Calypte anna and Archilochus alexandri) have lower defense costs and more exclusive territories than juveniles. Adult C. anna are victorious over juveniles in aggressive [...]
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Sievert Rohwer, Auteur ; Christopher S. Wood, Auteur
Article
Alexandra Pavlova, Auteur ; Robert M. Zink, Auteur ; Sievert Rohwer, Auteur ; Evgeniy A. Koblik, Auteur ; Yaroslav A. Red'kin, Auteur ; Igor V. Fadeev, Auteur ; Evgeniy V. Nesterov, AuteurWe analyzed sequences of two mitochondrial DNA (mtDNA) gene regions (control region and ND2) totaling 1477 base-pairs from 232 specimens of the white wagtail Motacilla alba obtained from 27 localities throughout Eurasia. Although overall haploty[...]
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Robert M. Zink, Auteur ; Alexandra Pavlova, Auteur ; Sergei Drovetski, Auteur ; Sievert Rohwer, AuteurFive species of Eurasian birds displayed a range of mitochondrial DNA phylogeographic structures, including a single widespread lineage (common sandpiper), two geographically unsorted and closely related lineages (long-tailed tit), three partial[...]
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Luke K. Butler, Auteur ; Sievert Rohwer, Auteur ; Markus G. Speidel, AuteurBody feathers are important to many interactions birds have with their physical and social environments, such as streamlining the body for flight, thermoregulation, and social signaling. Birds differ dramatically in the texture of their body plu[...]
