What goes ''wac-wac'' and lives in a tree?
Surprisingly, the Great Horned Owl.
Owls have a rich repertoire of sounds for communicating
in the dark. They scream, chitter, squawk, squeal, bark,
moan, trill, whine, chuckle, and clap their bills.
And, yes, they hoot. Owls use these sounds to stake
their claim on a territory, defend their homes from
predators, and attract a mate. They have special
sounds when begging for food, expressing
alarm, or warning of danger. This comprehensive
2-CD audio guide presents nearly 200
recordings of North America's 19 regularly occurring
owl species plus two rarities. If you ever have
trouble getting someone to wake up in the
morning, just turn this CD on!