But being short on military, they send only owls...An extreme decline in the rodent population in the boreal forest has caused thousands of owls to head south in search of food.More than 2,000 great gray owls, 200 hawk owls and 300 boreal owls have been spotted in Minnesota, northern Michigan and other parts of the upper US. More typical numbers would be last year's: 35 great gray owls, 6 northern