Flores Hawk-Eagle (Nisaetus floris) Science Article 1 abstract The Changeable Hawk Eagle Spizaetus cirrhatus complex ranges from India (cirrhatus) through South-East Asia (mainly limnaeetus) to Flores, Sumbawa and Lombok, Indonesia (floris). The latter taxon is morphologically very distinct from the widespread limnaeetus. It has diagnostic white patches on the upperside of the inner parts of […]
Category: Accipitridae
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), […]
Epizootic Vacuolar Myelinopathy of the Central Nervous System of Bald Eagles (Haliaeetus leucocephalus) and American Coots (Fulica americana)
Bald Eagle () Science Article 1 abstract Unprecedented mortality occurred in bald eagles (Haliaeetus leucocephalus) at DeGray Lake, Arkansas, during the winters of 1994-1995 and 1996-1997. The first eagles were found dead during November, soon after arrival from fall migration, and deaths continued into January during both episodes. In total, 29 eagles died at or […]
Elanus leucurus breeding in Surinam
White-tailed Kite (Elanus leucurus) Science Article 2 abstract The South American race of the White-tailed Kite (E. l. leucurus) according to Hellmayr and Conover (‘Catalogue of Birds of the Americas’. Field Mus. Nat. Hist., Zool. Set. 13, pt. 1, No. 4: 18, 1949) has been found definitely breeding only in Argentina and Chile. ‘The scattered […]
Food partitioning between breeding White-tailed Kites(Elanus leucurus; Aves; Accipitridae) and Barn Owls(Tyto alba; Aves; Tytonidae) in southern Brazil
White-tailed Kite (Elanus leucurus) Science Article 1 abstract I examined the diet of breeding White-tailed Kites (Elanus leucurus; Aves; Accipitridae) and Barn Owls (Tyto alba; Aves; Tytonidae) in an agrarian area of southern Brazil by analyzing regurgitated prey remains. The objective was to evaluate how these raptors, which differ markedly in their hunting activity periods […]
PREY OF THE WHITE-TAILED KITE IN CENTRAL CHILE AND ITS RELATION TO THE HUNTING HABITAT
White-tailed Kite (Elanus leucurus) Science Article 3 abstract Between November 1973 and January 1974 we collected 702 pellets of Whitetailed Kites (Elanus lecurus) in two areas of central Chile differing in their vegetation physiognomy (disturbed versus undisturbed). We compared the diversity, age structure, and mean prey size of items found in pelletsf rom both simmTs.h […]
Nest-site selection by Marsh Harrier (Circus aeruginosus) in the shore belt of Helophytes on large lakes
Western Marsh Harrier (Circus aeruginosus) Science Article 2 abstract Nest-site selection by Marsh Harrier (Circus aeruginosus) was investigated on Lakes Meteliaiand Obelija in 1983n1986 and Lake fialtytis in 1984n1986 in southern Lithuania. Fifty five breedingpairs were detected and 49 nests (89.1%) were found. With regard to the potential breeding habitat,Lakes Meteliai and fialtytis represented extreme […]
The effect of predation by Marsh Harriers Circus aeruginosus on the survival of ducklings and game bird chicks.
Western Marsh Harrier (Circus aeruginosus) Science Article 4 abstract The level of predation by a pair of Marsh Harriers Circus aeruginosus on ducklings and gamebird chicks was calculated from observations of hunting ranges, feeding rates and diet, and estimates of the availability of prey during the breeding season. The harriers took 22% of the Pheasant […]
Factors influencing nest material selection in Marsh Harrier (Circus aeruginosus)
Western Marsh Harrier (Circus aeruginosus) Science Article 3 abstract Marsh Harrier used at least 30 plant species from natural and cultural landscapes andhabitats for nest building on Lakes Meteliai, Obelija and fialtytis (southern Lithuania). Helophytesdominated among plant species, particularly reeds, though the share of terrestrial plants (especially ofrobust agrolandscape plants) sometimes was very significant. The […]
Changes in the frequency of prospecting fly-overs by Marsh Harriers Circus aeruginosus in relation to short-term fluctuations in dabbling duck abundance
Western Marsh Harrier (Circus aeruginosus) Science Article 7 abstract Wintering waterfowl gathering in large flocks during the day may be attractive to avian predators in a way similar to that of bird colonies. The response of Marsh Harriers to changes in dabbling duck abundance was monitored on four freshwater sites in the marshes of western […]