The Eggs of Birds 445 
invariably white. Many indeed have such glossy, highly 
polished shells that, were they laid in exposed situations, 
their shining surface would be a sure guide to hungry 
Fic. 353.—White eggs of Hairy Woodpecker in hollow tree. 
(Bowdish, photographer. ) 
egg-eaters. Among such birds may be mentioned the 
owls, woodpeckers and parrots, trogons, motmots, king- 
fishers and puffins, besides many others which hide their 
