Elephant challenged Frog to a wrestling match.
"I accept your challenge under one condition," said Frog. "We must run and jump into the wrestling ring."
"I agree!" said Elephant, confident in his strength.
All the animals came to watch the match.
Then Frog and Elephant ran and jumped into the ring. Frog jumped easily, but Elephant isn't a good jumper; he stumbled and fell. When Elephant hit the ground, Frog pinned him down and declared victory.
To celebrate his victory, Frog's whole family started croaking loudly, and that is why frogs croak today: they are celebrating Frog's victory over Elephant.
[a story from Liberia]
Inspired by: "Why Frogs Croak" in Folktales from Liberia (in Journal of American Folklore) by Richard C. Bundy, 1919.