Spend 24 hours on a river in western North America and discover 13 animals that depend on the river for survival.

Intricately detailed illustrations capture the many mammals, birds, fish, and insects that co-exist, hunt, and survive in the river and along its banks. Each panoramic spread represents a new hour to gage diurnal and nocturnal activity. Probing questions encourage and test young readers' retention of newly learned information, and back matter includes a glossary of terms and animals.