While running with my dog at lunchtime today, through mixed deciduous 
forest at the upper end of Brown Schoolhouse Rd. in Norwich, we seem to 
have alarmed a bird. Although not seen as it flew off(?), it whistling 
loudly at about once/second. The alarm call (whistle) was louder and 
sharper than anything that comes to mind.

Anyone have suggestions as to what this bird may have been? The forest 
edge wasn't far away, with a large open field beyond. Other birds 
typically seen there include ovenbirds, vireos, ruffed grouse, flickers...

Doug Hardy, Norwich