Hawfinch (Coccothraustes coccothraustes) Science Article 1 abstract One to three out of four different species of protozoanparasites were detected in ten individual hawfinches (Coc-cothraustes coccothraustes Linnaeus, 1758) as follows:Haemoproteus fringillae (Labbe, 1894), Leucocytozoondubreuili Math is et Lege r, 1911, L. fringillinarum Wood-cock, 1910, and L. majoris (Laveran, 1902). K, HAUPTMANOVA, V. BARUS, I. LITERAK, V. […]
FORAGING ECOLOGY OF REINTRODUCED CAPTIVE-BREDSUBADULT HARPY EAGLES (HARPIA HARPYJA) ON BARROCOLORADO ISLAND, PANAMA
Harpy Eagle (Harpia harpyja) Science Article 3 abstract A male and female Harpy Eagle (Harpia harpyja), both reintroduced captive-bred subadults,were observed on Barro Colorado Island (BCI), Panama for 89 and 205 days, respectively, between June 1999 and August 2000. The male captured 25 individuals from nine different mammalian species and the female captured 46 individuals […]
A sight record of the Harpy Eagle (Harpia harpyja) in Chiapas, Mexico
Harpy Eagle (Harpia harpyja) Science Article 1 abstract I recorded a Harpy Eagle (Harpia harpyja) while conducting an environmental impact assessment with the Instituto de Historia Natural de Chiapas, Mexico, for construction of the highway from Sayula, Veracruz to Ocozocoautla, Chiapas. My sighting was made on 12 March 1991 about 17:00 h, at the Reserva […]
Nesting of the Harpy Eagle (Thrasaetusharphyia)
Harpy Eagle (Harpia harpyja) Science Article 2 abstract One of the most interesting results of an expedition to northeastern Brazil, taken by the writer in conjunctionw ith Mr. Rodolphe M. de Schauenseed uring the late winter and spring of 1926, was the discovery of a nest of the Harpy Eagle (Thrasaetush arpyia), about three miles […]
Gyrfalcon predation on ptarmigan: numerical andfunctional responses
Gyrfalcon (Falco rusticolus) Science Article 3 abstract Gyrfalcon predation on ptarmigan during the breeding season was studied innorth-east Iceland 1981
Southern Extension to the Breeding Range of the Gyrfalcon,Falco rusticolus, in Eastern North America
Gyrfalcon (Falco rusticolus) Science Article 2 abstract We report the observation of four gyrfalcon (Falco rusticolus) nests and several adults south of the previouslyrecognized southern limit of the species’ breeding distribution in eastern North America. Our southernmost observation extendsthe known breeding range approximately 400 km to the south. The northern forest tundra biome could delineate […]
Diving speeds and angles of a gyrfalcon (Falco rusticolus)
Gyrfalcon (Falco rusticolus) Science Article 1 abstract An optical tracking device recorded the threedimensional paths of 11 dives by a 1.02 kg gyrfalcon, trained to dive to a falconer. The dives started at altitudes up to 500 m above the ground and were inclined at angles of 17-62 deg from the horizontal. The falcon controlled […]
Distribution of Murres outside the Breeding Season
Guillemot (Uria aalge) Science Article 3 abstract The main purpose of this document is to propose a coordinated international banding plan for Thick-billed Murres and Common Murres. Banding is an essential tool for describing with mapping the winter distribution of different murre populations, identifying overlapping distributions, determining the timing of migration, and ascertaining impacts of […]
Population status of the Common Murre Uria aalge in British Columbia
Guillemot (Uria aalge) Science Article 6 abstract The Common Murre Uria aalge is one of the most abundant breeding seabirds in the northern hemisphere (Ainley et al. 2002). The species has a rather disjointed breeding distribution along the Pacific coast of North America: hundreds of thousands of individuals breed on colonies in Oregon and northern […]
Adult survival and avian cholera in Common Guillemots Uria aalge in the Baltic Sea
Guillemot (Uria aalge) Science Article 2 abstract Common Guillemots Uria aalge are long-lived seabirds with a low annual reproductive output; hence annual adult survival is a significant parameter for the sustainability of the population (Harris & Birkhead 1985, Hudson 1985). Oiling, bycatches, and large-scale oceanographic and foodweb changes are commonly considered to be potential major […]