Group 5. 
INDEX TO KEY TO FAMILIES. 
Birds having wings measuring from 3.25 to 9.50 inches 
long 
Section 1. 
Section 2. 
Section 3. 
Bill with strong hook, toes armed with talons 
Upper mandible with more or less hook, but toes 
not armed with talons 
Tip of upper mandible not notched or hooked 
Part 1. First primary less than half as long as 
third, sometimes very small . 
Part 2. First primary more than half as long as 
third 
Birds having wings over 9.50 inches long 
RAGE 
139 
139 
140 
141 
