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 …

Continue reading »

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 …

Continue reading »

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. …

Continue reading »

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 …

Continue reading »

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 …

Continue reading »

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

Dec 31 2011

Speciation and rapid phenotypic differentiation in theyellow-rumped warblerDendroica coronatacomplex

Yellow Warbler (Dendroica petechia) Science Article 7 abstract The relative importance of the Pleistocene glacial cycles in driving avian speciationremains controversial, partly because species limits in many groups remain poorly understood,and because current taxonomic designations are often based on phenotypic characteristicsof uncertain phylogenetic significance. We use mtDNA sequence data to examinepatterns of genetic variation, sequence …

Continue reading »

Permanent link to this article: http://www.planetofbirds.com/yellow-warbler-article-7

Dec 31 2011

Do female Yellow Warblers (Dendroica petechia) incubatewhile in the nest during the laying period?

Yellow Warbler (Dendroica petechia) Science Article 2 abstract Although some passerine species heat their eggs during the brief periods of nest attentiveness early in the laying period (e.g., Haftorn 1981), egg temperature data are not available for Yellow Warblers (Dendroica petechia). As part of a larger study on the effect of Brown-headed Cowbird (Molothrus ater) …

Continue reading »

Permanent link to this article: http://www.planetofbirds.com/yellow-warbler-article-2

Dec 31 2011

Male plumage, paternal care and reproductive success in yellow warblers,Dendroica petechia

Yellow Warbler (Dendroica petechia) Science Article 13 abstract Using morphological or behavioural features correlated with paternal care, females can, priorto mating, assess the potential parental contribution of males. As a first step in a study of female matechoice in yellow warblers, this study was designed to examine the importance of paternal care by malesof diVering …

Continue reading »

Permanent link to this article: http://www.planetofbirds.com/yellow-warbler-article-13

Dec 31 2011

Breeding habitat use by sympatric and allopatric populations of Wilson’s Warblers and Yellow Warblers

Yellow Warbler (Dendroica petechia) Science Article 15 abstract We studied Wilson’s Warbler (Wilsonia pusilla) and Yellow Warbler (Dendroica petechia) habitat use in allopatric and sympatric populations in the Rocky Mountains of northern Colorado and southeastern Wyoming in order to better understand the different habitat needs and interactions of these two species. Janet M. Ruth and …

Continue reading »

Permanent link to this article: http://www.planetofbirds.com/yellow-warbler-article-15

Dec 31 2011

yellow warbler (dendroica petechia) breeding biology and parasitism by the shiny cowbird (molothrus bonariensis) inboqueron, puerto rico

Shiny Cowbird

Yellow Warbler (Dendroica petechia) Science Article 6 abstract Aspects of the breeding biology of the Yellow Warbler (Dendroica petechia) and ShinyCowbird (Molothrus bonariensis) parasitism were studied in Boqueron, Puerto Rico from 2001 to 2002.Fifty-seven percent (n = 12) of warbler nests were parasitized. Survival of parasitized nests was lowerthan non-parasitized nests. Thirty-four percent of nests …

Continue reading »

Permanent link to this article: http://www.planetofbirds.com/yellow-warbler-article-6

Older posts «