Bobolink (Dolichonyx oryzivorus) Science Article 6 abstract Most species of birds are socially monogamous, however approximately 8% of bird species are polygynous. By mating polygynously,females lose paternal care, but might gain access to a superior territory or male. We examined five factors that affect polygyny inbobolinks: territory size, perching sites, predation rate, insect abundance, and […]
Distribution, ecology and conservation status of the Blue-headed Macaw Primolius couloni
Blue-headed Macaw (Primolius couloni) Science Article 1 abstract Until recently thought to be secure (i.e. Least Concern), the Blue-headed Macaw is now classified as Endangered in the IUCN Red List, based on an apparent decline and a population estimate of
Foraging and diet composition of the black-capped foliage-gleaner (philydor atricapillus)
Black-capped Foliage-gleaner (Philydor atricapillus) Science Article 1 abstract Twenty nine samples regurgitated from the dead-leaf specialist Black-capped Foliage-gleaner (Philydor atricapillus) after administration of tartar emetic were examined to assess the diet of the species. Similarly, samples of invertebrate fauna living in suspended dead-leaf clusters were obtained to estimate prey availability for the birds. Diet was […]
Monitoring Black Guillemot population and nesting success at Herschel Island, Yukon Territory ? 2005
Black Guillemot (Cepphus grylle) Science Article 7 abstract The Black Guillemot colony at Pauline Cove on Herschel Island is the only one in the Yukon Territory, and one of the few in the western Arctic. This colony has been monitored for population and nesting success since about 1984. The nearest Black Guillemot nesting colony to […]
Nesting records of the genus Daptrius (Falconidae) from the Brazilian Amazon, with the first documented nest of the Black Caracara.
Black Caracara (Daptrius ater) Science Article 1 abstract Nesting records of the genus Daptrius (Falconidae) from the Brazilian Amazon, with the first documented nest of the Black Caracara. Whittaker, A., Ararajuba 4:107-109, 1996 Download article download full text (pdf)
Nesting of Black Baza A. leuphotes and Jerdons Baza Aviceda jerdoni in Buxa Tiger Reserve, West Bengal, India
Black Baza (Aviceda leuphotes) Science Article 1 abstract Jerdon?s Baza Aviceda jerdoni and Black Baza A. leuphotes have similar distributions in south, east and north-east India to South-East Asia and China (Grimmett et al. 1998, Ferguson-Lees and Christie 2001). Their breeding biology is relatively poorly known, although some information has been published e.g. Baker (1935), […]
Observation of the Coereba flaveola (Bananaquit) on Springfield Plantation feed habits
Bananaquit (Coereba flaveola) Science Article 3 abstract Coereba flaveola (Bananaquit) feeds predominantly in the morning rather in the lateafternoon. It concentrated mainly on the mangos and the bananas as its main dietaccording to the location site off the back porch of the stream house Celia Montes, Texas A&M University Study Abroad Download article download full […]
Movements of adult and juvenile bananaquits within a morph-ratio cline
Bananaquit (Coereba flaveola) Science Article 1 abstract Adult and juvenile Bananaquits (Coerebafi aveola) were captured and banded at nine different sites in southern Grenada in August-October 1976, 1977, and 1978. The proportion of black morphs decreased to seaward on Point Saline.T he morph-ratio cline was steeper for adults than for juveniles, because juveniles move greater […]
Characterization of an Orange Variant of the Bananaquit(Coereba tTaveola) on La D sirade, Guadeloupe, French West Indies
Bananaquit (Coereba flaveola) Science Article 2 abstract The Bananaquit( Coerebfaia veola)i s a phenotypically variable species of the American tropics that varies markedly in the extent and intensity of both its carotenoid and melanin pigmentation. Paynter (1968) recognized4 1 subspecieso f Bananaquitsa, nd plumage color polymorphism has been reported on some Caribbean islands (Wunderle 1981a, […]
A shift in the morph ratio cline in the bananaquit on grenada, west indies
Bananaquit (Coereba flaveola) Science Article 4 abstract The two Bananaquit (Coerebaflaveolu) color morphs and the morph ratio cline on Grenada have been described in detail by Wunderle (198 1 a). The yellow morph is restricted to the dry northeastern and southwestern portions of the island. The melanic, or black morph, occurs throughout the island, but […]