presumed Gray-cheeked Thrush nocturnal flight calls
Fig.2. Minnesota September 16, 1987 (WRE).
Fig.3. Alabama October 9, 1989 (WRE).
Fig.4. New York October 1, 1990 (WRE).
Fig.5. New York October 1, 1990 (WRE).
Nocturnal flight call sequences:
1. New York September 16, 1990 (WRE).
2. New York September 16, 1990 (WRE).
3. New York October 1, 1990 (WRE).
4. New York October 1, 1990 (WRE).
5. New York October 1, 1990 (WRE).
6. New York October 3, 1988 (WRE).
7. Alabama October 9, 1989 (WRE).