A study conducted by a team of researchers from the University of California, Riverside, Indiana University, Purdue University, Fort Wayne, and George Washington University showed that lizards from islands are more calm then ones from mainland regions. The researchers established this by comparing the flight initiation distance, or distance before a prey starts to flee when approached, between various lizards. The researchers were able to approach island lizards more closely then mainland lizards. The study was inspired by a long-time debate that island animals were more “tame” that started with an observation by Charles Darwin when he visited the Galapagos Islands. He felt that because these islands were scarce of most predators, those animals which did not waste energy fleeing unnecessarily would have a better chance of survival. All of this being said the findings were inconclusive.There are many variables that factor in to flight initiation distance and can not be categorized by where a creature lives.