Table 1.

Influenza A virus detection rate in cloacal swabs and feathers from wild ducks in northwestern Minnesota, U. S. A.

Date	Location	Sample type	Sample size	Detection rate (%)
2010
Sep. 8	Mud River	Cloacal swabs	72	19
		Feathers	10	100
Sep. 9	Tamarac Pool	Cloacal swabs	56	11
		Feathers	22	27
Sep. 14	Mud River	Cloacal swabs	72	8
		Feathers	31	61
2011
Sep. 7	Tamarac Pool	Cloacal swabs	101	20
		Feathers	24	0
	Thief Lake	Cloacal swabs	135	61
		Feathers	24	100
Sep. 15	Mud River	Cloacal swabs	45	13
		Feathers	24	0
Sep. 22	Roseau River	Cloacal swabs	16	25
		Feathers	21	10