Why does twain choose to use a frog instead of another animal in his story?

Mark Twain chooses a frog in "The Celebrated Jumping Frog of Calaveras County" primarily for its humorous and quirky characteristics, which align with the story's comedic tone. Frogs are often seen as amusing and somewhat absurd creatures, making them ideal for a tale centered on gambling and deception. Additionally, the frog's jumping ability serves as a focal point for the competition, highlighting themes of skill and trickery in a lighthearted manner. Ultimately, the choice of a frog enhances the story's charm and reinforces its satirical take on human nature.