Birds that have been isolated from adult members of their own species still fly south in the autumn. ... If birdsa#39; migrations are instincitive, and not a result of separated foresight, we are justified in asking how birds aquot;knowaquot; when to start flying and how they are able to navigate. ... Migration in birds then is an instinctive behaviour that can be accomplished even by birds that have been isolated from birth. Birdsanbsp;...
|Title||:||The Unique Animal|
|Author||:||Don D. Davis|