The Hints

So why do hippos yawn? Thousands of years ago Hippos were land dwelling animals but the hot African sun meant they were subject to sunburn on their delicate pink ears. So they called a meeting with God.
At the meeting they asked God if they could spend their days in the cool water of rivers and ponds so they could cool their hot bodies and prevent their delicate pink ears from sunburn. God, at first, was not sure about this. He was worried that the Hippos wanted to feast on the numerous fish in the rivers and ponds. The hippos protested at this assumption.
So they decided to make a deal with God. If he would let them spend their days in the cool water they would several times a day open their mouths toward the heavens and show God they did not have any fish in their mouths.
God thought about this proposal, after some time he agreed. So the hippos entered the water and several times a day opened their mouths to show God that they did not have any fish in their mouths. And all this time you thought hippos were yawning :) :) :) :) :)
Location:Mikumi National Park, Tanzania

Angry & Hungry!!!
After searching them the whole day... coz they have been hiding in the bushes.... then we got lucky to see 4 of them at once... but this was almost the end of the day!
Location: Saadani National Park, Tanzania