Peregrine Falcon (Falco peregrinus) Science Article 8 abstract Some falcons, such as peregrines (Falco peregrinus), attack their prey in the air at the end of high-speed dives and are thought to be the fastest of animals. Estimates of their top speed in a dive range up to 157ms?1, although speeds this high have never been […]
Category: Falconidae
Nest-site overlap and coexistence between Bonelli’s Eagle (Hiera tus fasciatus) and Peregrine Falcon (Falco peregrinus) in an area of simpatry.
Peregrine Falcon (Falco peregrinus) Science Article 2 abstract Nest-site selection has been compared between the populations of Bonellis Eagle (29 pairs) and Peregrine Falcon (35 pairs) in an area of simpatry in Southeastern Spain (Granada province). 18 variables evaluating habitat humanisation, physiography, intraspecific and interspecific distances and vegetation (Appendix 1) were compared between both species […]
Population size and factors affecting the density of the Peregrine Falcon in Spain
Peregrine Falcon (Falco peregrinus) Science Article 3 abstract By means of bibliographical searches and requests of unpublished information from ornithologists and public administrations all over the country, the population size estimate of the Peregrine Falcon Falco peregrinus in Spain is updated. Spanish population is estimated at 2435-2743 pairs, which represents a mean density of 5.1 […]
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)
Aplomado falcon steals prey from little blue heron
Aplomado Falcon (Falco femoralis) Science Article 5 abstract A juvenile male Aplomado Falcon (Falcofemoralis) was observed to steal crayfish(Cambarus diogenes) from Little Blue Herons (Egretta caerulea). Crayfish are not known tobe a common prey item of the Aplomado Falcon. To our knowledge this is the first instanceof piracy reported for this falcon. Falcons of the […]
Double brooding by American kestrels in Idaho.
American Kestrel (Falco sparverius) Science Article 22 abstract No abstract Steenhof, K. and B.E. Peterson. 1997, J. Raptor Res. 31(3):274-297. Download article download full text (pdf)
Antibody-mediated immunotoxicity in American Kestrels (Falco sparverius) exposed to polychlorinated biphenyls.
American Kestrel (Falco sparverius) Science Article 23 abstract Antibody-mediated immune function in adult and recently fledged (30 to 33 d old) American kestrels (Falco sparverius) was examined in birds exposed directly, or only in ovo, to polychlorinated biphenyls (PCBs). In 1998, 9 mature male and 9 female kestrels were fed PCBs, whereas 9 females and […]
Nesting observations of the Yellow-Headed caracara in the cerrado region of Brazil
Yellow-headed Caracara (Milvago chimachima) Science Article 1 abstract Although the Yellow-headed Caracara (Milvago chimachima) is widely distributed, common birds in South America, little is known concerning their breeding biology. Bierregaard (in del Hoyo et al. 1994) conducted an excellent review of known data, but details are based on fragmented observations, are incomplete, and often inferential […]
Feeding associations between capybaras Hydrochoerus hydrochaeris (Linnaeus) (Mammalia, Hydrochaeridae) and birds in the Lami Biological Reserve, Porto Alegre, Rio Grande do Sul, Brazil.
Yellow-headed Caracara (Milvago chimachima) Science Article 2 abstract Feeding associations between capybaras Hydrochoerus hydrochaeris (Linnaeus, 1766) and some bird species were registered in the Lami Biological Reserve, southern Brazil, through observations in a set of transects established in the five major vegetation types of the study area: shrubby and herbaceous swamps, wet grasslands, sandy grasslands […]
Seed dispersal of Attalea phalerata (Palmae) by Crested caracaras (Caracaraplancus) in the Pantanal and a review of frugivory by raptors
Southern Crested Caracara (Caracara plancus) Science Article 1 abstract We observed Crested caracaras (Caracara plancus) consuming and dispersing fruits of the palm Attaleaphalerata at Pantanal, Brazil. We reviewed the literature of seed dispersal by raptors and suggest that raptors may affectseed dispersal by three different paths: secondary seed dispersal by preying on frugivorous birds, primary […]