Black-throated Green Warbler (Dendroica virens) Science Article 1 abstract The Great Lakes strongly influence local climate, vegetation, and animal communities,all of which are important to both migrating and breeding birds. This influencecan be considerable during springtime in nearshore habitats, as onshore winds depress airtemperatures, delaying development of shoreline vegetation relative to inland areas. Thesedevelopmental differences […]
Category: Passeriformes
NONBREEDING HABITAT SELECTION AND FORAGING BEHAVIOR OF THE BLACK-THROATED GREEN WARBLERCOMPLEX IN SOUTHEASTERN MEXICO
Black-throated Green Warbler (Dendroica virens) Science Article 4 abstract We studied the ecological distribution and foraging behavior of three speciesin the Black-throated Green Warbler (Dendroica virens) species group in the Eastern Highlandsof Chiapas, Mexico. The three species, Black-throated Green, Hermit (D. occidentalis)and Townsend’s (D. townsendi) Warblers are largely allopatric on the breeding grounds andvariably sympatric […]
Biometrics, ageing, sexing and moult of the Blue Chaffinch Fringilla teydea teydea on Tenerife (Canary Islands)
Blue Chaffinch (Fringilla teydea) Science Article 1 abstract The Blue Chaffinch Fringilla teydea is one of a few Palearctic species for which biometric data are lacking from the field; we address this issue here. Blue Chaffinches were caught by mist net, at ten sites on Tenerife (Canary Islands), and measured. Data on biometrics and moult […]
Density estimates, microhabitat selection and foraging behaviour of the endemic Blue Chaffinch Fringilla teydea teydea on Tenerife (Canary Islands)
Blue Chaffinch (Fringilla teydea) Science Article 2 abstract Point counts were used for censusing birds. Data were analysed with the DISTANCE software programs using an average detectability function. Microhabitat structure was characterized by measuring 11 variables in a 25m radius at each point. We used Poisson regression models to predict counts for Blue Chaffinch from […]
Ecological relationships between feather mites (Acari) and wild birds ofEmberizidae (Aves) in a fragment of Atlantic Forest in northeastern Brazil
Blue Dacnis (Dacnis cayana) Science Article 1 abstract The objective of this study was to investigate feather mites on birds of the Family Emberizidae, tocollect data on the ecological ectoparasite-host relationship and infestation level. A sum of 94 birds of 9 specieswas captured at the Refugio Ecologico Charles Darwin, Igarassu, Pernambuco, Brazil, from August 1996 […]
Effects of breeding density and plumagecoloration on mate guarding and cuckoldry in bluegrosbeaks (Passerina caerulea)
Blue Grosbeak (Passerina caerulea) Science Article 3 abstract For species in which females mate outside of the pair bond, selection should favor male mate-guarding behaviors that minimize investment in genetically unrelated offspring. Mate guarding may impose costs by diverting time and energy from activities such as foraging and seeking extra-pair copulations, so males should adjust […]
NOTES ON THE LIFE HISTORY OF THE BLACK-CRESTEDANT SHRIKE IN SURINAM
Black-crested Antshrike (Sakesphorus canadensis) Science Article 1 abstract The Black-crested Ant Shrike (Sakesphorus cayanensis) is a mediumsized member of the large, neotropical family of antbirds (Formicariidae). In the male the head, sides of face, throat, and breast are uniform black. The abdomen and sides of the breast are slate gray, while the upper back is […]
Open-habitat birds in recently burned areas: the role of the fire extent and species’ habitat breadth
Black-eared Wheatear (Oenanthe hispanica) Science Article 1 abstract Single burned areas contained 0 to 15 open-habitat species (mean = 7.6), and in all the areas combined there were 22 species, including 17 with an unfavourable conservation status in Europe. The most frequent were Carduelis cannabina, Lullula arborea, Alectoris rufa, Oenanthe hispanica and Emberiza cia, but […]
A family name for the monotypic oscine passerine genus Donacobius
Black-capped Donacobius (Donacobius atricapilla) Science Article 1 abstract The taxonomic affinities of the Neotropical endemic bird genus Donacobius (and its only species D. atricapilla) have long been a challenging issue in systematic ornithology. Sincethe 19th century, this monotypic genus has been alternatively regarded as a member of the following oscine passerine families: Turdidae, Troglodytidae, and […]
REPRODUCTION AND SOCIAL ORGANIZATION OF THE BLACK-CAPPED DONACOBIUS (DONACOBIUS TRICAPILLUS) IN SOUTHEASTERN PERU
Black-capped Donacobius (Donacobius atricapilla) Science Article 3 abstract A color-banded population of Black-capped Donacobius (Donacobius atricapillus) on a Peruvian oxbow lake was studied during one breeding season and censused for 3 yr thereafter. Eighteen territories along a marshy shoreline were occupied by groups of 2-4 donacobius. Each group contained a mated pair and 0-2 helpers, […]