The chart below is a compilation of the last nine years of OIAS participation in the North American Migration Count.
 

Conditions	2002	2001	2000	1999	1998	1997	1996	1995	1994
Weather
Precipitation	none	none	none	light	none
Clouds	cloudy	clear	clear	cloudy	clear
Temp Dawn	32	42	45	47	52
Temp AM	38	45	50	48	68
Temp Noon	39	48	58	50	69
Temp PM	48	57	55	52	76
Temp Dusk	47	47	49	49	59
Wind Dawn	E 10	10 N	10 W	10 SW	still
Wind AM	E 10	15 N	10 W	15 SW	10 NE
Wind Noon	E 15	15 N	15 W	15 SW	15 NE
Wind PM	E 15	15 N	15 W	10 SW	15 W
Wind Dusk	E 15	15 N	15 W	10 SW	10 NE
Number of Observers	11	13	15	13	19	15	20	12
Number of Parties	5	9	8	6	11
Regular
Hours on foot	20.7	43.5	54.4	28.4	54.25
Hours by car	19.4	23.8	22.2	18.7	14.7
Hours other					3
Miles on foot	18.5	28.7	50	22.2	39.75
Miles by car	187	287	26.7	294.8	269.25
Miles other
Night
Hours	1.8	2.6	2.5		1.25
Miles	10	40	10.5
Feeder Watch	6.3	12	17	2	4
Stationary	6	10	7.8	5	6
Total Hours	54.2	91.9	103.9	54.1	83.2	59.7	83.7	52.4
Total Birds	4584	5439	5195	6143	4598	5472	8482	5041
Total Species	136	121	133	121	113	132	153	128
Birds/hour	85	59	51	115	55	92	105	101
Number of Observers	11	13	15	13	19	15	20	12
Name	2002	2001	2000	1999	1998	1997	1996	1995	1994	Total
Common Loon		1								1
Pied-billed Grebe					2	1	4			7
Horned Grebe						2				2
D-crested Cormorant	16	85	25	44	106	216	223	189	25	929
American Bittern	1									1
Great Blue Heron	22	33	16	29	52	37	37	80	16	322
Great Egret	1				2		1			4
Snowy Egret			1						1	2
Green Heron	4		8	8	2	3	3	1	8	37
BIk.-cr. Night Heron							8			8
Mute Swan	82	44	44	87	31	78	30	5	44	445
Canada Goose	134	168	94	128	152	184	155	125	94	1234
Wood Duck	7	14	14	7	25	13	35	20	14	149
Green-winged Teal							12			12
Am Black Duck			4			1			4	9
Mallard	161	249	283	293	189	251	436	200	283	2345
Northern Pintail	2					1				3
Blue-winged Teal	3	2	10	20	11	119	17	2	10	194
Northern Shoveler	2				6	11	10	12		41
Gadwall		3					1			4
American Widgeon	1					6				7
Canvasback						2				2
Redhead						1				1
Ring-necked Duck							1			1
Greater Scaup						1	2			3
Lesser Scaup				1	1	8	12	7		29
Scaup sp.		1								1
Com Goldeneye							1	1		2
Bufflehead				4		10	2	10		26
Hooded Merganser:		1								1
Com Merganser				5		22	18	3		48
Red-br Merganser	7				5	7				19
Ruddy Duck			1	2	12	12	5	3	1	36
Turkey Vulture	4	35	22	14	18	16	21	33	22	185
Osprey	1						2			3
Bald Eagle	1		2			1			2	6
Sharp-shin Hawk			3	1	1	4	2		3	14
Cooper's Hawk	1				2	1		1		5
Northern Goshawk	1									1
Red-shouldered Hawk							1			1
Broad-wing Hawk		1	3		3	3	3		3	16
Red-tailed Hawk	6	14	8	5	13	16	13	11	8	94
Buteo sp					1		2			3
American Kestrel	2	1	3	1	5	4	6	4	3	29
Merlin				1			1			2
Peregrine Falcon	1	1	2						2	6
Ring neck Pheasant	1	2			1	4	2	1		11
Ruffed Grouse						1				1
Wild Turkey	4	8	2	8		4	12		2	40
Northern Bobwhite					1					1
Virginia Rail	1		<