The following table is for the years 1974 through 2005.

Species	Largest count day	#		Largest count year	#
OSPREY	Sept. 18, 1996	43		1996	86
BALD EAGLE	Sept. 19, 1996	16		2006	56
GOLDEN EAGLE	Nov. 15, 2000	8		2000	27
NORTHERN HARRIER	Oct. 4, 2000 Sept. 30, 2001	5		1997	19
SHARP-SHINNED HAWK	Oct 7, 1991	108		1991	548
COOPER'S HAWK	Oct. 4, 1987	108		1987	230
RED-SHOULDERED HAWK	Oct 11, 1998 Oct. 28, 2001	4		1966	24
BROAD-WINGED HAWK	Sept. 20, 1974	2684		1974	10501
RED-TAILED HAWK	Nov. 3, 1991	107		1991	247
ROUGH-LEGGED HAWK	All	1		2001	2
AMERICAN KESTREL	Sept. 20, 1991	28		1991	94
MERLIN	Oct. 6, 1996	6		2001	11
PEREGRINE	Sept. 27 2003	4		2003	12
GOSHAWK	Oct. 3, 1976	3		1976	3

The broad-winged hawk is the most common bird sighted. While observation dates range from August 12 to December 13, most broadwings (53%) come through in the five-day period surrounding September 21. In 1999, that number was 73%.