Any gecko species let alone the Giant Days will not migrate. The Giant day geckos is native to the Madagascar region. The Giant Day Geckos (Phelsuma madagascariensis grandis) thrive in a habitat from 76 F - 80 F, and the climate in Madagascar suites every one of their needs. MOST reptiles are unable to adapt to another environment, if they do, they are considered to be an invasive species in most cases. The Boas native to Asia, are now adapted to the everglades of Florida, Or the Tokay gecko now adapted to Floridas conditions. These animals were not endemic to these regions but due to reptile hobbyists releasing their pets, animals escaping etc.. they are now able to cope with the environment they are provided with. If Global warming were to make the Climate crash, in that case, the reptiles would need to relocate to survive.