396 The Griffon Vulture 
retracted, as is usual with birds carrying things on the wing. I have 
often watched Griffons sitting upon the upper branches of a cork-tree 
YOUNG GRIFFON VULTURE, ABOUT FOUR DAYS OLD, 
busily engaged in breaking off branches with their powerful beaks to 
convey to their nests. There can be no doubt that when a Griffon 
