KEY TO THE WATER BIRDS OF FLORIDA. 187 
Famity URINATORID®. Loons, Divers. 
Genus URINATOR Cvvirer. 
URINATOR IMBER (Guiz.). 
Loon. Great Northern Diver. 
Adult in summer : Head and neck black, showing green in some lights. A patch of white 
streaked with black on the throat and sides of the neck; under parts white: back streaked 
