Date of this Version
Proceedings Ninth Bird Control Seminar, Bowling Green State University, Bowling Green, Ohio, October 4-6, 1983. Ed. William B. Jackson and Beth Jackson Dodd
The numbers of blackbirds wintering in the north central Texas city of Denton appear to be increasing. Unusually large numbers of American robins (Turdus migratorius) in 1981-82 obstructed effective roost dispersal. Dispersal methods and procedures are described. Data are given on species composition, sex ratios, mean weights, and weight range for 2,781 birds taken January 29, 1982. Species composition and ratios are given for an additional 1,540 birds taken the following day. Current blackbird dispersal techniques are ineffective if large numbers of wintering robins are commingling with the blackbirds.