KEY TO FAMILIES. LAND BIRDS. 



137 



Part 2. Tip of upper mandible, not notched or hooked. 



Bill, as illustrated; back, brown; rump, with 

 concealed white spots; outer tail feathers, shortest; 

 tarsus, scutellate. 



Family TROQLODYTID/E. Wrens. 



See page 312. 



Bill, as illustrated; back, gray or bluish gray; nos- 

 trils, concealed by tufts of bristly feathers. 



Family PARID/C. 



Subfamily SITTIN/C. Nuthatches. 



See page 317. 









Bill, as illustrated; throat, black; crown, black 

 and uo rufous hiowu ou sides (Chickadee), or forehead, 

 black; sides, with rufous brown (Titmouse). 



Family PARID/E. Chickadees and Titmice. 552 



See page 318. 



Section 2. First primary, not short, always more than 



half as long as third. 



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



Bill, flattened and wide at 

 base ; numerous black bristles at 

 base of bill ; back of tarsus, rounded ; 

 wing, longer than tail. 



Top of bill. 



353 



Side of bill. 



Family TYRANNID^E. Flycatchers. 



See page 200. 



