From this AP story:
An alligator was captured inside the baggage hold of an airliner on Monday after escaping from its crate. The young alligator, just 4 to 5 feet long, remained inside a burlap bag with its mouth bound shut, American Airlines spokesman Tim Wagner said. Officers captured it with a looped device and put it back in its crate with three other gators shipped from Miami, officials said. Authorities were looking into how the reptile got out.