Publication Type: | Journal Article |
Year of Publication: | 1971 |
Authors: | Hogstad, O |
Journal: | Ornis Scandinavica |
Volume: | 2 |
Issue: | 2 |
Date Published: | 1971 |
ISBN Number: | 00305693 |
Keywords: | Dendrocopos, Dendrocopos major, Picidae, Picoides, Picoides major, Picoides tridactylus |
Abstract: | When foraging on trunks and branches of dead or decaying spruce trees, it was found that the Great Spotted Woodpecker and Three-toed Woodpecker utilized different feeding strata during October-March. The trees in which the woodpeckers were observed foraging were divided into four approximately equal vertical zones (1=0-1/4, 2=1/4-2/4, 3=2/4-3/4, 4=3/4-4/4). The mean relative heights of the Great Spotted Woodpecker and the Threetoed Woodpecker were 3.5 and 2.0, respectively. The degree of overlapping in foraging heights between the species was greatest in October and March, while the most apparent stratification occurred in January. |
URL: | http://www.jstor.org/stable/3676214 |
Short Title: | Ornis Scandinavica |
Taxonomic name: