Why did the pelican get kicked out of the restaurant?

This joke wings its way into the humor zone through a classic case of wordplay, specifically a pun. The entire gag hinges on the double meaning of the word "bill." In the setup, you're naturally thinking about a pelican's most distinctive feature: its enormous, scoop-like mouthpart. That's one kind of bill, perfect for fishing.

However, the punchline cleverly pivots to the other common meaning of "bill"—the itemized statement of charges you receive after a meal at a restaurant. Pelicans are known for their impressively large beaks, which are indeed often referred to as bills. The humor comes from the unexpected twist, taking the literal physical attribute of the bird and applying the financial concept of a restaurant tab.

The comedic genius here lies in the unexpected switcheroo. We all know pelicans have big bills, and we've all probably groaned at a hefty restaurant bill. The joke marries these two distinct ideas in a way that's silly and instantly understandable, making you chuckle at the cleverness of the linguistic trickery. It’s a simple, clean animal joke that relies on a common homonym for its punch.