Birds of Indian Subcontinent

Stratification in Winter Feeding of the Great Spotted Woodpecker Dendrocopos major and the Three-Toed Woodpecker Picoides tridactylus

Publication Type:Journal Article
Year of Publication:1971
Authors:Hogstad, O
Journal:Ornis Scandinavica
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.
Short Title:Ornis Scandinavica
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