Category Archive: science article

Jul 27 2014

Where to find the Black Woodpecker?

The biggest European Woodpecker selects his breeding site based on some clear indicators. Read the general information about the species here in the online bird guide. This species is very important to other cavity breeding species and is as such recognized as a key species. This bird excavates cavities with a mean diameter of 51 …

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Permanent link to this article: http://www.planetofbirds.com/where-to-find-the-black-woodpecker

Dec 31 2011

Food abundance and parental care in yellow warblers

Yellow Warbler (Dendroica petechia) Science Article 1 abstract Emlen and Oring (1977) suggested that monogamy in birds is maintained because of the need for strict biparental care. A corollary of their suggestion is that paternal care should decrease under conditions of high food abundance. An alternative is that paternal care would increase if males take …

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Permanent link to this article: http://www.planetofbirds.com/yellow-warbler-article-1

Dec 31 2011

Extra-pair mating, male plumage coloration andsexual selection in yellow warblers (Dendroica petechia)

Yellow Warbler

Yellow Warbler (Dendroica petechia) Science Article 14 abstract Extra-pair mating has been proposed as a source of sexual selection responsible for secondary sexual traitsthat are common among socially monogamous birds, although supporting evidence is scant. In the socially monogamous yellow warbler, males are larger than females, and unlike females, have extensivereddish streaking on their breasts. …

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Permanent link to this article: http://www.planetofbirds.com/yellow-warbler-article-14

Dec 31 2011

Ruby-throated hummingbirds observed following yellow-bellied sapsucker

Yellow-bellied Sapsucker (Sphyrapicus varius) Science Article 8 abstract The authors document an observed association between Yellow-bellied Sapsucker and Ruby-throated Hummingbird. They conclude that the hummingbirds’feeding at sapsucker wells may effect the timing of hummingbird migration. by David Flaspohler and David Grosshuesch Several species of hummingbirds are known to feed at the sap wells created by …

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Permanent link to this article: http://www.planetofbirds.com/yellow-bellied-sapsucker-article-8

Dec 31 2011

Yellow-billed Cuckoo (Coccyzus americanus): A Technical Conservation Assessment

Yellow-billed Cuckoo (Coccyzus americanus) Science Article 5 abstract In western North America, yellow-billed cuckoos (Coccyzus americanus) have undergone catastrophic declines; the eastern subspecies has undergone less rapid declines in most areas since approximately 1980. Direct loss and degradation of low-elevation riparian woodland habitats have been cited as the primary causes for the declines in yellow-billed …

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Permanent link to this article: http://www.planetofbirds.com/yellow-billed-cuckoo-article-5

Dec 31 2011

Adoption of yellow warbler nestlings by song sparrows

Yellow Warbler (Dendroica petechia) Science Article 3 abstract Although interspecific brood adoption has been reported in several species of birds, theprocess by which it occurs has seldom been reported. We observed a pair of Song Sparrows (Melospiza melodia) that adopted a brood of Yellow Warblers (Dendroica petechia) and, gradually, over several days, took over the …

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Permanent link to this article: http://www.planetofbirds.com/yellow-warbler-article-3

Dec 31 2011

Cuckoldry and lack of parentage-dependent paternal care in yellow warblers:a cost-benefit approach

Yellow Warbler (Dendroica petechia) Science Article 10 abstract Theory suggests that a male strategy of reducing parental care in response to reducedparentage should evolve only under certain conditions. Expected paternity in subsequent matings ispredicted to be primary in effect, because it determines whether there is a future benefit to compensatemales for the cost of reduced …

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Permanent link to this article: http://www.planetofbirds.com/yellow-warbler-article-10

Dec 31 2011

parental feeding of nestling yellow warblers in relation to brood size and prey availability

Yellow Warbler (Dendroica petechia) Science Article 12 abstract The feeding by adult Yellow Warblers (Dendroicap etechia) of nestlings in broods of 3, 4, or 5 young was studied during two breeding seasons on the forested dune ridge near Delta, Manitoba. Broods of 2-day-old young were selectively fed geometrid larvae by the adults, and broods of …

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Permanent link to this article: http://www.planetofbirds.com/yellow-warbler-article-12

Dec 31 2011

YELLOW WARBLER

Yellow Warbler (Dendroica petechia) Science Article 8 abstract Across its vast range, the Yellow Warbler is a highly variable species. Forty-threesubspecies are currently recognized, and are treated geographically as three groups. The aestivagroup breeds throughout much of the U.S. and Canada, from northern Alaska, northern Yukon,northwestern and central Mackenzie, northern Saskatchewan, northern Manitoba, northernOntario, central …

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Permanent link to this article: http://www.planetofbirds.com/yellow-warbler-article-8

Dec 31 2011

Interspecific Aggression By Yellow Warblers In A Sun Coffee Plantation

Yellow Warbler (Dendroica petechia) Science Article 5 abstract Non-breeding habitat use is mediated infrequently by interspecific aggression in migratory birds. Such aggression occurs most commonly among birds exploiting rich resource patches such as nectar, fruit, or other similar resources (Greenberg et al. 1994). Interspecificterritoriality and dominance is less commonly noted among insectivorous species (Rappole and …

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Permanent link to this article: http://www.planetofbirds.com/yellow-warbler-article-5

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