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

1211 brown creeper

1212 chestnut-sided warbler

1213 common redpoll

1214 ruby-crowned kinglet

1215 whimbrel

1216 white-crowned sparrow

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