Short-toed Snake Eagle (Circaetus gallicus) Science Article 2 abstract Capsule There is some evidence of susceptibility to stochastic or human factors. Aims To describe the phenology and breeding success of one of the densest populations of Short-toed Eagle in Europe. Methods All nests in the Dadia-Lefkimi-Soufli forest in northeast Greece were located and visited regularly […]
Category: Accipitriformes
A feeding record of the Short-tailed Hawk Buteo brachyurus in itssouthern range
Short-tailed Hawk (Buteo brachyurus) Science Article 1 abstract The Short-tailed Hawk Buteo brachyurus occurs from south USA through Central America, and south to northern Argentina and Chile (Thiollay 1994). This species is found to be uncommon, although widespread in large areas of South America (Robinson 1994, Manosa et al. 2003, Blendinger et al. 2004). Buteo […]
A conservative strategy in migrating Short-toed Eagles Circ tus gallicus
Short-toed Snake Eagle (Circaetus gallicus) Science Article 1 abstract […].The aim of this study was to provide information on the visible autumn migration of Shorttoed Eagles at these two sites of the Central Mediterranean through systematic observations made during the second half of September 2001. […]. Agostini, N., Baghino, L., Panuccio, M. & Premuda, G., […]
ECOLOGY AND BREEDING HABITS OF THE SAVANNA HAWKIN THE LLANOS OF VENEZUELA
Savanna Hawk (Buteogallus meridionalis) Science Article 1 abstract The ecology of the Savanna Hawk (Buteogallus meridionalis) was studied in the palm-savannas of Venezuela in 1978-1980. Pairs produced only one egg per clutch, no more than one young per calendar year, and had eggs or young in nests from February to December, coinciding largely with the […]
Visceral Gout in a Rough Legged Hawk (Buteo lagopus)
Rough-legged Hawk (Buteo lagopus) Science Article 1 abstract Visceral gout is reported for the first time in a rough legged hawk (Buteo Iagopus). Urate crystals were present on the pencardium, thoracic and abdominal air sacs, and the ventral surface of the liver. The liver and spleen also had urate crystals throughout the parenchyma. There was […]
Diet and Foraging Behavior of Nesting Roadside Hawks inPete
Roadside Hawk (Buteo magnirostris) Science Article 1 abstract In 1993 and 1994, we collected dataon the diet and foraging behavior of Roadside Hawks(Buteo magnirostris) in primary tropical forest withslash-and-burn farming landscape nearby. We identified140 prey items brought to nests: 90 in the farminglandscape and 50 in the forest. Reptiles (57.1%, mostlylizards) and amphibians (24.3%) were […]
Site-specific variation in partial brood loss in northern goshawks
Northern Goshawk (Accipiter gentilis) Science Article 1 abstract While many studies have shown that patterns of partial brood loss often differ with offspring sex, food availability or between years, the question of whether family-size adjustment varies between sites has achieved little attention. I investigated this in Finnish northern goshawks Accipiter gentilis, and found that partial […]
Age at first breeding and fitness in goshawk Accipiter gentilis
Northern Goshawk (Accipiter gentilis) Science Article 5 abstract Age at first breeding has a large influence on fitness and hence is crucial to the evolution of life-history strategies. Goshawks Accipiter gentilis start breeding aged 1-4 years. Using 30 years of data and both lifetime reproductive success (LRS) and lind as a fitness estimate for 74 […]
Food-niche differentiation in sympatric Hen Circus cyaneus and Montagu’s Harriers Circus pygargus
Northern Harrier (Circus cyaneus) Science Article 4 abstract Hen Harriers Circus cyaneus and Montagu’s Harriers Circus pygargus are medium-sized raptors that differ in size (Hen Harrier being slightly bigger than Montagu’s Harrier) and breeding system (Montagu’s Harriers are semi-colonial and Hen Harriers defend nesting-hunting territories). In contrast, the diets of the two species when in […]
Habitat use by Hen Harriers Circus cyaneus on Orkney: implications of land-use change for this declining population
Northern Harrier (Circus cyaneus) Science Article 3 abstract The use of habitats by hunting Hen Harriers Circus cyaneus just prior to the settlement period was investigated on Orkney, where numbers have declined by 70% over the last 20 years. Both males and females hunted over areas that were closer to subsequent breeding territories. Neither sex […]