Feathers 2 c 



by true feathers, which overhip, prolecting the hod}- from 

 heat and cold, dust and rain. 



Fig. 12{).^Lasl stages in the formation of a down feather, showing the plumes 

 well above the surface of the skin, as in u newly hatched chick. .\11 greatly 

 enlarged. 



At the time of the first moult, tliis succession of 

 feathers can be observed in almost any youn;Lr bird. l)ein<jj 

 more noticeable in large species, which have very thick 



