The trek—from the North American desert to Fiji—now represents the longest known migration of any terrestrial animal.

There are 45 different species of Iguanidae in the Caribbean and the tropical, subtropical and desert areas of North, Central, and South America, including the marine iguanas of the Galapágos and the chuckwallas in the American Southwest.

Iguanas may have pulled off a 5000 mile voyage on a raft of floating vegetation to get to Fiji. Researchers have long wondered how iguanas got to the collection of remote islands in the South Pacific.