28(3 



ZOOLOGY 



The family of Paridae includes the titmice, or tits and 

 nuthatches. The tits are chiefly Old World birds, but we 

 have a common representative in the black-capped chicka- 

 dee, well known from its cheerful whistle. In this family 



Fn;. 2(i(i. Wood-thrush (Turiltts 



belong the nuthatches which run over tree-trunks, head 

 up or down, indiscriminately (Fig. 268). 



The family of Certhiidae includes the little brown creeper 

 which runs over tree-trunks much as the nuthatches do 

 and uses its tail-feathers as props against the tree-trunk 

 (Fig. 2l JO). 



