Skip to main content
U.S. flag

An official website of the United States government

Allowable take of a population of red-winged blackbirds in the northern Great Plains

July 12, 2017

Red-winged blackbirds (Agelaius phoeniceus) are protected under the Migratory Bird Treaty Act (MBTA), which has provisions against take. Blackbirds may be taken legally without a Federal permit, however, under an existing Depredation Order (50 CFR 21.43), which allows for take of blackbirds that are in the process of doing, or about to do, agricultural damage. Modeling the effect of take on blackbird population allows us to balance the conservation protections of the MBTA with the protection of agricultural interests. A quantitative framework based on harvest theory, demography, and population status has been used to assess the allowable take of a number of species of birds under the MBTA. In this chapter, we calculate allowable levels of take for two populations of red-winged blackbirds in the northern Great Plains from estimates of intrinsic growth rate and population size.

Citation Information

Publication Year 2017
Title Allowable take of a population of red-winged blackbirds in the northern Great Plains
DOI
Authors Michael C. Runge, John R. Sauer
Publication Type Book Chapter
Publication Subtype Book Chapter
Series Title
Series Number
Index ID 70189582
Record Source USGS Publications Warehouse
USGS Organization Patuxent Wildlife Research Center