Back to matchesWe found a matchYour institution may have rights to this item. Sign in to continue.TitleFood availability, intrusion pressure and territory size: an experimental study of Anna's hummingbirds (Calypte anna)AuthorsEwald, P. W.; Eberhard, J. R.SubjectsANNA hummingbirdPublicationBehavioral Ecology & Sociobiology, 1994, Vol 34, Issue 1, p11ISSN0340-5443Publication typeArticle