What did the lizard that jumped off of neck eat in Holes?

You're thinking of the book "Holes" by Louis Sachar! It's a great story, but there's no mention of a lizard jumping off of anyone's neck.

The creature that jumps on Stanley's neck in the book is a yellow spotted lizard. It doesn't eat anything in the story, but it does make a memorable appearance and symbolizes the dangers and unpredictability of the desert environment.

Do you have any other questions about "Holes"? I'd love to chat about it!