Birds of Indian Subcontinent

Ecological Release and Ecological Flexibility in Habitat Use and Foraging of an Insular Avifauna

Publication Type:Journal Article
Year of Publication:1982
Authors:Vassallo, MI, Rice, JC
Journal:The Wilson Bulletin
Date Published:1982
ISBN Number:00435643
Keywords:Emberizidae, Paridae, Parkesia, Parkesia noveboracensis, Parulidae, Parus, Parus hudsonica, Parus hudsonicus, Passerella, Passerella iliaca, Poecile, Poecile hudsonica, Poecile hudsonicus, Seiurus, Seiurus noveboracensis, Sylvia, Sylvia atricapilla, Sylviidae, Zonotrichia, Zonotrichia iliaca
Abstract:Aspects of macrohabitat use by Fox Sparrows (Passerella iliaca), Northern Waterthrushes (Seiurus noveboracensis) and Boreal Chickadees (Parus hudsonicus) differ between insular Newfoundland and coastal populations of each species. The differences generally reflected changes in the ranges of available habitats between localities, rather than responses to differing competitive environments. Foraging locations of coastal and insular Boreal Chickadee populations were also compared. Differences were found--the Boreal Chickadee expanded the breadth of its foraging activities to include areas used on the mainland by Blackcapped Chickadees (P. atricapillus), a species absent on the island. Seasonal differences were also found in chickadee foraging behavior at both sites. Niche partitioning between the two mainland species of chickadees was accomplished via differences in foraging position rather than macrohabitat differences.
Short Title:The Wilson Bulletin
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