For recordings of bird songs, call 612-673-7800, and when prompted press the following four-digit numbers:

1227 hermit thrush

1228 Louisiana waterthrush

1229 mourning dove

1230 Northern mockingbird

1231 whimbrel

1232 worm-eating warbler

Recordings from the Library of Natural Sounds, Cornell Laboratory of Ornithology. Try the lab's website: www.birds.cornell.edu.