There was a show, I believe called lion battlefield or something, on the Discovery Channel about a year ago, that showed how animals attack, survive, and help each other in parts of Africa.
I basically starts out showing an animal dead (from natural causes). The hyena's were the first to pick up on it, so they started making their calls, and hyena's started coming in from many directions to get to the animal. They were the first ones there.
All along, while this was happening, there were vultures flying around above. When one vulture noticed that hyenas were coming in from many directions, it starts to signal other vultures that there is food somewhere.
As the vultures would come in from different directions, this signaled the jackals down on the ground that there was food somewhere.
When the vultures would land, many animals wouldn't try and eat them due to the fact that a lot of animals depend on vultures to find a kill so they in return could eat. The vultures and the jackals would share dead animals. As the jackals came in though, they outnumbered the hyenas, and the animal was theirs.
While all of this was going on though, the slowest of the group to pick up on a dead animal, the lion, was also trying to find food. Once he picked up on this same animal and gets to the site, everything else fled. It was basically all a race to eat this animal before the lion gets there.
Pretty cool stuff
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