presumed Song Sparrow nocturnal flight call
Fig.6. New Jersey October 26, 1995 (MO).
With presumed Hermit Thrush night flight call in the background.
Fig.7. New York October 19, 1988 (WRE).
Fig.8. Wisconsin April 5, 2001 (WRE).
Harris's Sparrow is also a possibility.
Fig.9. Minnesota October 27, 2000 (WRE).
Fox or White-crowned Sparrow are also possibilities here.