Because of all the sand which is there.
To stop themselves sinking into the sand. Why did the ostrich stick its head in the sand To look at the camels who forgot to put their sandals on.
You can't unload sand with pitchforks.
Very tired feet.
They both have Sandy Claws.
Me: "Why did you guys put my frog on the No-Fly List !" Agent: "Umm..." Me: "DAMMIT, HE'S STARVING!"
Starving.