KEY TO FAMILIES. 



LAND BIRDS. 



GROUP 1. 



Birds having wings less than 1.75 inches long.* 



i^^^ 



(1. ) Smallest of our birds ; bill, very slender ; 

 primaries, 10; rectices, 10; feet, very small and 

 weak. 



Family TROCHILID/E. Humming Birds. 



See page 199. 



(2.) Tail, rounded; the outer feathers, shorter than n)id- 

 (lle ones; first pi-imary, less tlian two thirds as long as third; 

 second primary, mueh shcn-ter than third; tarsus, seutellate. "^° 



Family TROGLODYTID^. Wrens, Thrashers, etc. 

 Subfamily TROQLODYTIN/E. Wrens. 



8ee page ^i]2. 



GROUP 2. 



Birds having wings from 1.75 to 2.75 inches long.'^ 



Section 1. First primary, less than half as long as third. 



Part 1. Tip of upper mandible, with small but distinct hook or notch. 



(1.) Toes, joined at base. Tlain colored birds, usually -ireenish or grayish, but often 

 show 11 faint wash of yellow on underparts; tail, always without white spots. 



Family VIREONID.-E. Vlreos. 



Sec page 171. 



•For dlrectious for measurement, 

 (133) 



