For recordings of bird songs, call 612-673-7800, and when prompted press the following four-digit numbers:
1220 greater prairie chicken
1221 mourning dove
1222 red-winged blackbird
1223 ruffed grouse
1224 trumpeter swan
1225 wild turkey
Recordings from the Library of Natural Sounds, Cornell Laboratory of Ornithology. Try the lab's website: www.birds.cornell.edu.
