The Canyonlands Field Institute is offering a wide variety of one-day seminars in April and May. Courses include Desert Weather, April 23; Dinosaur tracking, May 6; Birds of the Colorado River, May 7; Pothole Ecology, May 13; Lizards of Arches, May 14; Writing From Nature, May 20; and Literary Landscapes, May 21.

For more information, contact the institute at 259-7750.