Leucophrys
National Institutes of Health
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Northern populations of the White-crowned Sparrow, Zonotrichia leucophrys, show varying degrees of social modulation of…
Patterns of nestling feeding by males and females were compared in sympatric populations of Harris’s Sparrows ( Zonotrichia…
Observations of captive Ringed Teal allowed several previously undescribed displays to be noted, including specialized displays…
Resumo. Descrevemos quatro componentes (tipo de floresta utilizada, altura de ocorrencia e tipo e ~ngulo do substrato utilizado…
-We used 19 restriction endonucleases to analyze patterns of cleavage site variation in the mitochondrial DNA (mtDNA) of the five…
We compared the proportions of mammalian‐type and reptilian‐type nephrons in the kidneys of two species of passerine birds. The…
White-throated sparrows (Zonotrichia albicollis) of both sexes and male white-crowned sparrows (Z. leucophrys) were studied in…
In a number of the avian species in which testicular development can be evoked by increased daily photoperiods it has been found…