For recordings of bird songs, call 612-673-7800, and when prompted press the following four-digit numbers:
1243 black-bellied plover
1244 blue grosbeak
1245 osprey
1246 white-eyed vireo
1247 white-winged crossbill
Recordings from the Library of Natural Sounds, Cornell Laboratory of Ornithology. Try the lab's website: www.birds.cornell.edu.
