Blue-backed Tanager (Cyanicterus cyanicterus) Science Article 1 abstract The little-known Blue-backed Tanager, Cyanicterus cyanlcterus (Vieillot), sole member of its genus, has been recorded primarily as an inhabitant of the Guianas, with an outlying record in Brazil on the lower Rio Negro near Manaus. It will undoubtedly be found eventually in the part of Brazil, ornithologically […]
Category: Passeriformes
Complex communication signals: the caseof the Blue-black Grassquit Volatinia jacarina(Aves, Emberizidae) song. Part I – A structural analysis
Blue-black Grassquit (Volatinia jacarina) Science Article 1 abstract The song of the Blue-black Grassquit Volatinia jacarina is different for every individual and the structuraldifferences between individuals are quite complex. Samples of songs from different Brazilian localities,as well as from Venezuela and Mexico, were studied through a comparative analysis of their sonograms.From the structural point of […]
Climate change and spring migration in the Yellow Wagtail Motacilla flava : an Afrotropical perspective
Blue-headed Wagtail (Motacilla flava) Science Article 3 abstract Timing of pre-migratory fattening among Yellow Wagtails Motacilla flava wintering in Nigeria pre-1980 is compared with that in the period 2004-2006 to determine whether this has been affected by trends towards earlier spring phenology in Europe over the same period. Wagtails wintering in northern Nigeria showed later […]
Phylogeographic patterns in Motacilla flava and Motacilla citreola: species limits and population history
Blue-headed Wagtail (Motacilla flava) Science Article 1 abstract We conducted phylogeographic analyses of Motacilla fl ava (Yellow Wagtail) andM. citreola (Citrine Wagtail). We analyzed mitochondrial DNA sequences from 167 M. fl avaspecimens obtained from 17 localities throughout Eurasia and Alaska, and 38 specimens of M.citreola obtained from 7 Eurasian localities. Phylogenetic analysis revealed three clades […]
Communal roosting of Linnets (Carduelis cannabina) and Blue-headed Wagtails (Motacilla flava) at post-breeding period in Western Poland.
Blue-headed Wagtail (Motacilla flava) Science Article 2 abstract Communal roosting of Linnets (Carduelis cannabina) and Blue-headed Wagtails (Motacilla flava) at post-breeding period in Western Poland Surmacki A, Lorek G & Tryjanowski P., Vogelwarte. vol 40, no 1-2. p. 146-148 Download article download full text (pdf)
LIFE HISTORY OF THE BLUE AND WHITE SWALLOW
Blue-and-white Swallow (Notiochelidon cyanoleuca) Science Article 1 abstract This Swallow has the upper plumage is dark, violaceous steel-blue; the under parts are pure white except for the blue-black under tail-coverts, the grayish-brown sides and flanks, and a few dusky spots in the center of the chest, which are lacking on some individuals. The tail is […]
FEMALE MATE CHOICE IN RELATION TO STRUCTURAL PLUMAGE COLORATION INBLUE GROSBEAKS
Blue Grosbeak (Passerina caerulea) Science Article 1 abstract Plumage blueness in Blue Grosbeaks (Passerina caerulea) is related to nutritional conditionduring molt, and bluer males hold larger territories with more food resources. We tested the hypothesis that females use male plumage brightness as a criterion in choosing mates. In a mate-choice aviary, we presented females with […]
Nest and breeding behavior of the Black-tailed Leaftosser Sclerurus caudatus (furnariidae)
Black-tailed Leaftosser (Sclerurus caudacutus) Science Article 1 abstract The genus Sclerurus consists of six species that are uniform morphologically (excluding bill length and width) and have similar ecology and behavior (Vaurie 1980). The range of Sclerurus extends from Mexico and Central America to Bolivia and eastern Brazil (Vaurie 1980, Ridgely & Tudor 1994). Typically found […]
ADDITIONAL RECORD OF THE BLACK-THROATED GREEN WARBLER IN PUERTO RICO, WITH SOME OBSERVATIONS ON FORAGING BEHAVIOR
Black-throated Green Warbler (Dendroica virens) Science Article 3 abstract The Black-throated Green Warbler (Dendroica virens) ranges from eastern Canada to Colombia,including the West Indies where it is uncommon and restricted to the Greater Antilles (Clements 1978, Faarborgh & Terborgh 1980). The species is considered a rare winter migrant to the islands, occurring from mid September […]
EXPERIMENTAL EVIDENCE FOR INTRINSIC MICROHABITAT PREFERENCES IN THE BLACK-THROATED GREEN WARBLER
Black-throated Green Warbler (Dendroica virens) Science Article 2 abstract Black-throated Green Warblers (Dendroica virens) use coniferous vegetation as foraging and perching substrates at coastal sites in Maine and predominantly deciduous vegetation at inland sites in interior New Hampshire, despite the availability of both substrates. I tested the hypothesis that these habitat use patterns result from […]