It is fun to watch and photograph the great blue heron rookeries at Lilypons Water Gardens near Frederick, MD during the months of April through June when they build the nest, mating, hatching and finally seeing chicks. You’ll need a long telephoto lens – I use 400mm lens with either Nikon D7000 or D600 camera. Click the link for more photos –
https://plus.google.com/photos/117762756506129657750/albums/6000869614238730449?authkey=CKSqu42Y3tj8fg