Describes studies at winter bird feeders which enhance instruction of ecology at the University of Michigan biological station. Background material is provided for field activities in which black-capped chickadees are observed and for home range determination and population estimate activities. (DH)

Recounts experiences of an environmental biology class, highlighting the eight-day field trip that is the culmination of the course. Describes activities during the bus trip, a two-day canoe trip, and field work at the Ozark Underground Laboratory and Blanchard Springs Caverns. Also discusses the field journal and final examination. (JM)