This article describes the design and implementation of a 1-credit-hour seminar in comparative psychology as a supplement to an introductory biopsychology course. The purpose of the course was to introduce students to the ecological and evolutionary aspects of animal behavior by building on topics that are introduced in many biopsychology courses. This article provides suggestions for course assignments and course reading materials. The current approach of introducing undergraduate students to comparative psychology by attaching a seminar to an existing course offers a framework that could possibly be used with many other undergraduate psychology courses. (Contains 2 tables and 2 notes.)