The area we visit in Costa Rica is full of iguanas. We often see them sunbathing on the lawn behind the condo where we stay. There were plenty around the estuary when we took our ride.
The boatmen always have a quartered pineapple in a cooler. During the trip they slice it into bite-sized pieces, providing the passengers with a tasty snack. Our pilot threw the rinds to the iguanas. They were pretty interested.