Gyrfalcon (Falco rusticolus) Science Article 3 abstract Gyrfalcon predation on ptarmigan during the breeding season was studied innorth-east Iceland 1981
Category: Falconiformes
Flight performance during hunting excursions in Eleonora’s falcon Falco eleonor
Eleonoras Falcon (Falco eleonorae) Science Article 1 abstract Among birds, falcons are high-performance flyers, in many cases adapted for rial hunting and hence suitable targets for investigating limits to flight performance. Using an optical range finder, we measured flight tracks of Eleonora’s falcon (Falco eleonor ), a species breeding in the Mediterranean region and specialised […]
Is growing tourist activityaffecting the distribution ornumber of breeding pairs ina small colony of the Eleonora’s Falcon?
Eleonoras Falcon (Falco eleonorae) Science Article 4 abstract Is growing tourist activity affecting the distribution or number of breeding pairs in a small colony of theEleonora’s Falcon?
Soaring Flight in the Eleonora’s Falcon (Falco eleonorae)
Eleonoras Falcon (Falco eleonorae) Science Article 3 abstract Eleonora’s Falcon (Falco eleonorae)breeds in the Mediterranean region and is highlyadapted for catching small birds on passage migrationbetween Eurasia and their African winter quarters,which they feed their young.We studied glidingflight behavior of Eleonora’s Falcon at a breeding colonylocated on a small island southwest of Sardinia,Italy. Gliding and […]
The study of nest-site preferences in Eleonora’s falcon Falco eleonoraethrough digital terrain models on a western Mediterranean island
Eleonoras Falcon (Falco eleonorae) Science Article 2 abstract This study addresses nesting-site preferences in Eleonora’s falcon Falco eleonorae by means of geographic information systems and high-quality high-resolution digital terrain models (DTMs). A small western Mediterranean archipelago (Columbretes Islands) with a colony of 34 pairs was chosen as a case study. Overall, 21 grid variables obtained […]
NEST-SITE CHARACTERISTICS AND BREEDING DENSITY OFTWO SYMPATRIC FOREST-FALCONS IN GUATEMALA
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 […]
Photos of Micrastur species in Peru, covering the Surinam species
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)
Breeding biology and behavior of the Collared forest-falcon (Micrastur semitorquatus) in Guatemala
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 […]
Allopreening in the Black Vulture
Black Vulture (Coragyps atratus) Science Article 2 abstract Black Vultures (Coragyps atratus) regularly feed on offal during low tide on the muddy shore of the Surinam River in the center of Paramaribo. At high tide they rest on roofs of buildings along the waterfront where they spend the time sunning in a very upright stance […]
Black Vulture Nesting, Behavior, and Growth
Black Vulture (Coragyps atratus) Science Article 1 abstract Black Vultures (Coragypsa tratus) have nestedf or 5 consecutivey r (1975-1979) on a small island in Gatun Lake, Panamir. The 1975 nest site (McHargue 1977) was 6 m from nests of the following 3 yr, which were all within 1 m of each other. The 1979 nest […]