Factual error: The monkeys that are threatening The Rock when he is hanging in the trees are baboons which are native to Africa, not to the Americas. In a magazine interview about the movie The Rock mentions "howler monkeys" (which are from South America)
Factual error: How on earth does Travis lift the statue of El Gato with one hand? He waves it about as if it were made of papier mache. It is made of solid gold - and it is going to weigh more than 20 kilograms.
Chosen answer: He wasn't searching him with the toad. The local man was attempting to sell it to him. It was simply odd timing in the movie for that to happen.