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University Library, University of Illinois at Urbana-Champaign

Illinois Ornithology: Early Ecological Studies of Illinois Birds

This guide points highlight key resources on Illinois Ornithology, including publications of the Illinois Natural History Survey, and facilitates easy access to digitized content where available. (Braxton)

The Illinois State Laboratory of Natural History published early studies on the trophic ecology of birds, with emphasis on the importance of birds in controlling insect populations and the resulting benefit to agriculture.

Data from "The Food of Birds (Forbes, 1903)