Stratification in winter feeding of the great spotted woodpecker Dendrocopos major and the three-toed woodpecker Picoides tridactylus

Publication Type:

Journal Article

Authors:

Hogstad, Olav

Source:

Ornis Scandinavica, Nordic Society Oikos, Volume 2, Issue 2, p.143-146 (1971)

Call Number:

A71HOG01IDUS

Keywords:

Dendrocopos major, Eurasian Three-Toed Woodpecker, Great Spotted Woodpecker, 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 Three-toed 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.

Notes:

Reference Code: A71HOG01IDUS

Full Citation: Hogstad, O. 1971. Stratification in winter feeding of the great spotted woodpecker Dendrocopos major and the three-toed woodpecker Picoides tridactylus. Ornis Scandinavica 2(2): 143-146.

Location: ANIMAL EF: PICOIDES TRIDACTYLUS