An overcast morning with winds out of West at 12 mph.  Temps just above freezing creating some light ground along the Merrimack River banks.  While on lookout for eagles, noticed a some type of disturbance down river that caused over 30 gulls to wheel up in a cloud of circling flight.  Sure enough, an adult eagle heads west up river and lands on a perch.  Leg bands visible but not clear enough o decipher digits on the bands.