Dominance
The social hierrarchy within and between species, also called 'peck order'. Within a species, males may be dominant over females, except perhaps at the nest, but females may dominate immature birds. Examples of dominance between species are Great Tit Parus major over Blue Tit P. caeruleus and Carrion Crow Corvus corone over Jackdaw C. monedula, in these cases dominance being apparently a matter of size.From Peter Weaver's Birdwatcher's Dictionary
Copyright © 1981 by Peter Weaver