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Articles 61 - 61 of 61
Full-Text Articles in Life Sciences
Foraging Ecology Of Temperate-Zone And Tropical Woodpeckers, Robert A. Askins
Foraging Ecology Of Temperate-Zone And Tropical Woodpeckers, Robert A. Askins
Biology Faculty Publications
The foraging behavior of 11 species of woodpeckers in Guatemala, Maryland, and Minnesota was studied in order to test the seasonal stability hypothesis. This hypothesis predicts that specialization and species richness should be no greater for tropical wood-excavators than for those in the temperate zone because wood-excavators in both regions are buffered against seasonal change. Niche breadth values for six variables that describe foraging methods and perches were calculated by two methods. Unweighted niche breadth values were similar for tropical and temperate woodpeckers for all variables except foraging techniques; in this case the temperate species are more specialized. With weighted …