Snail Kite (Rostrhamus sociabilis) Science Article 4 abstract Snail Kites (Rostrhamus sociabilis sociabilis) observed along the lower Rio Magdalena in northern Colombia fed heavily on Pomacea chemnitzi but also took Marisa cornuarietis, a smaller species. The kites captured Pomacea preferentially over Marisa and had difficulties extracting Marisa from its shell. They also failed to extract […]

Snail Kite (Rostrhamus sociabilis) Science Article 5 abstract The hunting behavior, snail size selection, and time-activity patterns of non-breeding Snail Kites (Rostrhamus sociabilis sociabilis) were studied in Guyana rice fields. Kites spent 62% of the photoperiod perching, 19% foraging, 13% in maintenance activities, and 6% flying. As the day progressed, the percentage of daylight hours […]

Snail Kite (Rostrhamus sociabilis) Science Article 2 abstract Kleptoparasitism is defined as the stealing of food from an individual by another individual (Rothschild and Clay 1952). Interspecific kleptoparasitism occurs in many animal groups but is particularly widespread among birds, especially when individuals of different species regularly congregate at feeding areas (Brockmana nd Barnard 1979). BRUCE […]

Snail Kite (Rostrhamus sociabilis) Science Article 3 abstract The breeding biology of the Snail Kite was studied in Florida from 1968-1977 and intermittently from 1978-1980. Breeding occurred every month, but not in the same year. Peak egg-laying occurred from February through April or generally about 81 d before the onset of the rainy season in […]

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 […]

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 […]

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., […]

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 […]

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 […]

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 […]