Hooded Merganser
Lophodytes cucullatus
The hooded merganser is the smallest of the three merganser species in North America. An adult weights about 620 grams (1.4 lbs) and is 40-50 cm (16-20 in.) long; males are larger than females. Like other mergansers, they have a long serrated bill for grasping and handling live prey.
Sea Duck Information Series fact sheet
Hooded Merganser Species Knowledge Summary and Information Needs [PDF]