ORIGIN AND CHARACTERISTICS 53 



blind and helpless, generally naked, fed by their 

 parents for a long period, and with no reserve 

 of food-yolk in the stomach when they break 

 from the shell, they are classed as Higher 

 Nidicolae. This group includes the Pigeons, 

 Birds of Prey, Owls, Parrots, Cuckoos, all 

 Picarian birds and all the Passeres. 



