When Sam brings in an elephant to smash the fort door down, it has tusks, but when Bugs gets rid of it with a windup mouse, the tusks are gone.
Bugs Bunny leaves foot prints in the desert sand but Yosemite Sam and the camel do not.
Bugs arrives at the oasis, surveys the watering hole, and says "I always pictured the Atlantic Ocean as so much bigger". It is generally accepted that Bugs grew up in New York City, in which case he would have ample opportunity to see the Atlantic Ocean any time that he wanted to.