Le rôle de la végétation dans l'emplacement des sites de reproduction chez Circus cyaneus L. et Circus pygargus L. dans des secteurs de reboisement en conifères

Auteur :
CORMIER, J. P.

Description :
The location of Hen and Montagu's Harriers nests was studied from 1970 to 1982 in a conifer plantation and in surrounding moors of heath and thornbroom in Maine-et-Loire, near Saumur, France. The Hen Harrier prefers to nest in conifers and uses places where trees are 4 to 27 years old. Montagu's is more frequent on moors and nests in younger pine plantations. The decrease of the Montagu's Harrier population from 22 pairs in 1972 to 8 in 1982 cannot be explained entirely by the increase in height of the Pine trees. Other factors night interfere, particularly competition between the two species as far as the nesting area is concerned.


Type de document :
Article de périodique

Source :
Revue d'écologie. La terre et la vie Paris, 1984, vol. 39, n°. 4, p. 447-457, Références bibliographiques : 17 réf.

Date :
1984