Sierra Birds: A Hiker's Guide, written and illustrated by John Muir Laws. Calif. Academy of Sciences and Heyday Books, 64 pages. $9.95
The Day the Trash Came Out to Play, by David M. Beadle, illustrations by Laurie A. Faust, Ezra's Earth Publishing. $16.95
For both the novice and experienced birdwatchers, Sierra Birds: A Hiker's Guide would be a useful resource. The book's organization is user-friendly and its slim, lightweight size makes it easy to tote around in a full day pack or on multi-day backpacking trips.