The proportion of known yearling males (indicative of immigration) accounted for only about 18% of the breeding population, which appears consistent with Ward’s (2005) findings for isolated populations.
La proportion de jeunes mâles âgés de un an (indicateur d’immigration) ne représentait qu’environ 18 p. 100 de la population nicheuse, ce qui semble correspondre aux conclusions de Ward (2005) sur les populations isolées.