Masters of Deceit

Ravens especially like working with wolves. Sometimes they'll croak loudly to direct a pack of wolves to weak game they couldn't themselves attack. Researchers who have examined this kind of cooperation even suspect wolves are driven to hunt in packs mainly because of the ravens. The predators are good sprinters and could theoretically slay game the size of deer alone or in pairs. But they would harldy get any meat for themselves during the feast that follows the slaying, due to the superior number of ravens.

From Masters of Deceit