Sexual Dimorphism and Patterns of Territory Use by the White-Backed Woodpecker Dendrocopus leucotos

TitleSexual Dimorphism and Patterns of Territory Use by the White-Backed Woodpecker Dendrocopus leucotos
Publication TypeJournal Article
Year of Publication1991
AuthorsAulén G, Lundberg A
JournalOrnis Scandinavica
Volume22
Issue1
Pagination - 60 - 64
Date Published1991
ISBN Number00305693
KeywordsDendrocopos leucotos, Dendrocopus
Abstract

Male and female White-backed Woodpeckers differ in morphology in that males have longer bills than females and are also heavier. We found that this size dimorphism was accompanied by numerous differences in resource utilization pattern. Briefly, males foraged in larger trees than females and on thicker trunks and branches. Males more often used live trees than did females, and deep wood pecking as a foraging technique. We find it unlikely that bill size dimorphism has evolved to enable the sexes to utilize different foraging niches. Rather foraging differences are a consequence of size dimorphism, male dominance and/or interspecific competition.

URLhttp://www.jstor.org/stable/3676622
Short TitleOrnis Scandinavica