La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Characteristics of Peregrine and Lanner Falcon nesting habitats in South Africa
Auteurs :	A. R. Jenkins, Auteur
Type de document :	Article
Dans :	Ostrich (71(3-4) SEP 2000)
Article en page(s) :	416-424
Langues:	Anglais
Résumé :	Peregrine Falcon, Falco peregrinus, and tanner Falcon, F: biarmicus, nesting habitats in South Africa ore described in terms of nest ledge, nest cliff and scree slope parameters, and the environmental context of each site. Data were collected in a tropical study area where Peregrines and Lanners occurred in sympatry, from an allopatric south temperate Peregrine population, and opportunistically for both species from other sites throughout the country. Elevation, ledge size, cliff size and vegetation structure accounted for about 80% of the variation in falcon nesting habitats between species and between populations within species. Peregrines used larger nest ledges on higher, more elevated cliffs than Lanners, overlooking more open, structurally complex vegetation. Temperate Peregrines used smaller ledges on lower cliffs, overlooking vegetation that provided less refuge for overflying prey than subtropical pairs. temperate Peregrines selected nest sites to minimize the negative effects of spring rainfall. Tropical Peregrines may have selected sites to maximize hunting and provisioning efficiency.

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