title: Tool use to modify calls by wild orang-utans.
authors.affiliation: Division of Zoology, School of Biological Sciences, University of New England, Armidale, N.S.W., Australia. hpeters@metz.une.edu.au
authors.forename: H H
authors.initials: HH
authors.lastname: Peters
mesh_terms: D000378:Agonistic Behavior / Q000502:physiology*; D000818:Animals; D000835:Animals, Wild / Q000502:physiology*; D001522:Behavior, Animal / Q000502:physiology*; D005260:Female; D008297:Male; D018515:Plant Leaves; D011148:Pongo pygmaeus / Q000502:physiology*; D014828:Vocalization, Animal / Q000502:physiology*