KEY TO THE WATER BIRDS OF FLORIDA. 143 
Famity STERCORARIDE. Jarcers. 
Stercorarius parasiticus (adult ). Stercorarius parasiticus (immature ). 
Stercorarius parasiticus (foot). 
Central tail feathers elongated in the two following species: 
Length, 17; Wing, 13; Tail (adult), about 8.40; Tail 
(immature), about 6; Bill, 1.20. Stercorarius parasiticus. 
Parasitic Jaeger. See page 189 
Length, 20.50; Wing, 12.25; Tail (adult), about 12.50; 
immature, about 6; Bill, 1.10. Stercorarius longicaudus. 
Longstailed Jaeger. See page 190 
