Warthogs were not terribly high on my list of 'must see' animals in while in Tanzania, but I was surprised to find them far cuter and more interesting than expected. Their skin is actually covered in a thick and bristle fur and they have some funny behaviors - for instance, when they run in a group, they always stick their tails straight up in the air. This reminded me a bit of remote control antennas - the tip of the tail was sometimes all you could see. The warthog was also surprisingly brave - we saw a warthog take on a cheetah when it was irritated that the cheetah was walking through his territory. And when rummaging in the ground, the warthog often gets down on his knees to get that big face closer to the dirt.
Here's two shots of the warthogs - one is a momma with her babies and the second is a warthog on his knees.