Collared Forest Falcon (Micrastur semitorquatus) Science Article 2 abstract The Barred Forest-Falcon (Micrastur ruficollis) and Collared Forest-Falcon (M. semitorquatus) are cavity nesters with similar geographic distributions but differences in body size. For Barred and Collared forest-falcons, nest height averaged 17 and 20 m above ground, nest tree dbh averaged 95 and 167 cm, and nest […]

Collared Forest Falcon (Micrastur semitorquatus) Science Article 3 abstract Five of the seven species of the mysterious Forest-falcons (Micrastur: Falconidae) occur en Los Amigos river basin, Madre de Dios, Peru Ursula Valdez, Boletin SAO Vol. XVI (No. 02) – Dic. 2006 Download article download full text (pdf)

Collared Forest Falcon (Micrastur semitorquatus) Science Article 1 abstract We studied Collared Forest-Falcons Micrastur semitorquatus in Tikal National Park, Guatemala from 1988 through 1993, documenting 9 nesting attempts. The Collared Forest-Falcon is a year-round resident, nesting in pre-existing cavities in large trees. Breeding commenced during the middle of the dry season. Egg laying occurred early […]

Barred Forest Falcon (Micrastur ruficollis) Science Article 1 abstract Between 5 March-13 May 1996 we observed a pair of Barred Forest-falcons in Peten, Guatemala demonstrating nuptial behavior and utilizing a cliff pothole as a nest site. Each morning and evening of 5-10 March, 8-13 April, and 8-13 May 1996, we heard a male Barred Forest-falcon […]

Barred Forest Falcon (Micrastur ruficollis) Science Article 3 abstract The Barred Forest-Falcon (Micrastur ruficollis) and Collared Forest-Falcon (M. semitorquatus) are cavity nesters with similar geographic distributions but differences in body size. For Barred and Collared forest-falcons, nest height averaged 17 and 20 m above ground, nest tree dbh averaged 95 and 167 cm, and nest […]

Barred Forest Falcon (Micrastur ruficollis) Science Article 4 abstract Five of the seven species of the mysterious Forest-falcons (Micrastur: Falconidae) occur en Los Amigos river basin, Madre de Dios, Peru Ursula Valdez, Boletin SAO Vol. XVI (No. 02) – Dic. 2006 Download article download full text (pdf)

Barbary Falcon (Falco pelegrinoides) Science Article 1 abstract We studied density, habitat selection and reproduction of Barbary FalconsFalco peregrinus pelegrinoides on Tenerife Island during 2004 and 2005. Atotal of 26 breeding pairs were counted, all of them occupying naturalcliffs around the island. Density observed was 1.27 pairs/100 km2, andwas positively correlated with cliff availability. Mean […]

Aplomado Falcon (Falco femoralis) Science Article 4 abstract describe here breeding season diets of Aplomado Falcons (F&co femoralis) at 18 sites in Veracruz, Campeche, and Chiapas, Mexico, based on 256 animals in prey remains and 234 prey that I detected while watching the falcons’ feeding behavior. Birds comprised 94% of individuals in prey remains, but […]

Aplomado Falcon (Falco femoralis) Science Article 1 abstract Hunting associations between Aplomado Falcons (Falco femoralis) and maned wolf (Chrysocyon brachyurui) were observed in six occasions in Emas National Park. central Brazil. Falcons were successful in 25% of their hunting attempts. This association benefits the birds that hunt flushing tinamous missed by the wolf’s attack. The […]

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 […]