Sandy Geffner and his students gather for class outside the Ellicott Complex.

Geffner explains various aspects of animal skulls.

How do you know if the skull is that of a predator?

Field Ecology explores the interrelationships of life with one another, and their relationships with the environment that supports them.

Senior Ally Miller listens as Geffner talks about the common wildflower he is holding, called butter-and-eggs.

From left: environmental studies majors Celia Phillips, Natalie Harvey and Isabel Luthringer take notes.