EDINBURGH, Scotland, Feb. 6 (UPI) -- Foreign communities of chimps don't normally join forces in the wild -- they're too territorial. But when a group of chimpanzees from Sweden were moved to Scotland to join six local chimps at the Edinburgh Zoo, researchers took the opportunity to study the subtleties of animal integration.
One of the more interesting observations involved a simple round piece of fruit -- an apple. Not all chimps like apples, and thus, different populations respond to different foods differently. The Swedish chimps like apples very much, and generally respond to their presence with a high-pitched sound of delight. Scottish chimps are less enthusiastic, and remark so with a lower-pitched grunt of disappointment.