Florida,
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v Double-Crested Cormorant
Double-crested Cormorant is goose-sized, slender bodied dark bird with
long neck and a hooked bill with 
orange
throat pouch. These types of birds are normally found in coasts, islands,
bays and rivers.
The double crested cormorant makes massive nests made up of sticks and other materials. The nests are often exposed to direct sun. The similar species of this kind are Great Cormorant, Neotrophic Cormorant, Brandt’s Cormorant and Red-faced and Pelagic Cormorants. Males and females look alike.
Double-crested Cormorant comes under the family Phalacrocorax. They are also called by the name Shag, Water Turkey, Crow Duck, Lawyer and Sea Goose. The Double-crested Cormorant swims very low in the water with its neck and head visible and dives from the surface. The flying characteristics of this Cormorant are very different as they are seen flying in long lines and very rarely in the form of angles.
In 1960s the number of this species decreased due to the effects of
DDT. The colonies of these birds have been victims from time to time because
they were considered to be competitors with the humans for fishing. But
the growth of Double-Crested Cormorant has increased lavishly by two factors.
By decreasing the contaminants, particularly the discontinued use of DDT
and also by the aquaculture ponds in its southern wintering grounds.