Blackwater National Wildlife Refuge, Maryland
I had been watching this large flock of snow geese mill about in a marshy area for some time on a frigid day in early February. A bald eagle flying overhead caused them to become very agitated, and suddenly the entire flock took noisily to the air. It was an amazing sight to behold, to hear, and to photograph.
Level adjustment, cropping.
Nikon D200, Sigma 50mm - 500mm lens, Manfrotto tripod