Meerkats!

They often stand on their rear legs and gaze alertly over the southern African plains where they live.

 

Fathers and siblings help to raise meerkat young, teaching them to play and forage and alerting them to the ever present danger from above.

 

A clan of meerkats will always have one "sentry" on guard to watch out for predators while the others forage for food.

 

If the meerkat on guard spots danger, it barks loudly or whistles in one of six different ways. For example if the threat is of low, medium or high urgency and if the predator is in the air or on the ground.

 

For a high-urgency land predator alarm call, meerkats will scatter down their nearest burrow entrance.  For a high-urgency aerial predator alarm call, they will crouch down and may look skyward.

 

Meerkat groups utilize several different burrows and move from one to another.