found that iguanas fed by tourists had higher levels of cholesterol and blood sugar than those eating a natural diet. They were also prone to bouts of diarrhea.
Weighing up to 550 pounds, these lumbering giants are eating machines. This is good news for the Aldabra ecosystem — as the tortoises gobble up grasses, they maintain a diverse plant community referred to as “tortoise turf.” Like elephants, they even topple over small trees to snack on leaves and fruits. The massive reptiles then disperse the fruit’s seeds in their droppings, replanting the atoll as they plod along.
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