CLASS AVES 



421 



Fig. 311. — A more complex nest of the robin, Planesticus m. migraforius Linnaeus, made 

 of dried grasses and fibers of a rope and cemented together by a thick layer of mud. Lined 

 with fine grasses and hair and built in a tree. (Photographed, copyrighted, and contributed 

 by Gayle Pickwell.) 



'^J^' 



Fig. 312. — The hanging nest of a California bush-tit, Psaltriparus minimus californicus 

 Ridgeway, made of fine gray moss and oak blossoms, is one of the most elaborate of all 

 North American birds' nests. (Photographed, copyrighted, and contributed by Gayle Pickwell.) 



