172 KEY TO THE WATER BIRDS OF FLORIDA. 
Length, 13.25; Wing, 4.50; Tarsus, 1.60; Bill, 1.80. 
Very small; throat pale yellow buff; under 
parts pale. Ardetta exilis. 
Least Bittern. See page 248 
Length, 13; Wing, 4.30; Tarsus, 1.40; Bill, 1.80. 
Throat and under parts deep chestnut. Ardetta neoxena. 
Cory’s Least Bittern. 
See page 249 
Famity GRUIDE. CRANES. 
Grus americana. 
Length, 51; Wing, 25.50; Tarsus, 12; Bill, 5.10. 
Plumage white; bare skin of head red. (Young 
birds have the head feathered.) Grus americana. 
Whooping Crane. See page 260 
Length, 45; Wing, 21.50; Tarsus, 10; Bill, 5.50. 
Plumage gray or brownish gray; bare skin of 
head red. (Young birds have the head feathered.) Grus mexicana. 
Sandhill Crane. See page 262 
