Linear Modeling of Blackbird Populations Breeding in Central North America

Authors

H. Jeffrey Homan, USDA/APHIS/WS National Wildlife Research Center
Linda B. Penry, USDA/APHIS/WS National Wildlife Research Center
George M. Linz, USDA/APHIS/WS National Wildlife Research CenterFollow

Date of this Version

February 2004

Comments

Published in National Sunflower Association Research Forum Papers 2004.

Abstract

Accurate estimates of blackbird populations are needed to develop and assess management programs to reduce blackbird damage to sunflower. Our objective was to use North American Breeding Bird Survey (BBS) indices to estimate the total blackbird population causing sunflower damage in North Dakota, South Dakota, and Minnesota.