Red-tail hawks (Buteo jamaicensis) were observed from a hawk blind located near the Macbride Nature and Recreation area in Johnson County, Iowa. Observations were conducted from early September through early December 1992-1998. Hawks were identified by age when trapped and visually when exhibiting migratory behavior. Visual and trapping observations show that immature migration is greatest earlier in the autumn season. Conversely, adult migrants increased later in the season. Differences in migration could be due to inexperience in hunting, breeding season length, sex, and developmental state. The red-tail behavior in Eastern Iowa was consistent with observations made at blinds along lead lines.
Kendall Ross, ’00 Golden, CO
Majors: Biology and Secondary Education
Sponsor: Robert Black