Why are many animals of the Galapagos Islands unafraid of humans?

The animals of the Galapagos Islands are unafraid of humans primarily because they evolved in an environment with few natural predators. For thousands of years, the islands' isolation meant that native species did not encounter large predators, leading to a lack of fear response towards unfamiliar creatures, including humans.1

This unique evolutionary path has resulted in many endemic species, such as the giant tortoises and marine iguanas, exhibiting remarkable tameness. It is crucial to respect this lack of fear and maintain a safe distance to ensure the animals' well-being and the preservation of their natural behaviors.1