Komodo dragon collision between Australia and Southeast Asia allowed these larger varanids to move back into what is now the Indonesian archipelago, extending their range as far east as the island of Timor. The Komodo dragon was believed to have differentiated from its Australian ancestors 4 million years ago. However, recent fossil evidence from Queensland suggests the Komodo dragon actually evolved in Australia before spreading to Indonesia. Dramatic lowering of sea level during the last glacial period uncovered extensive stretches of continental shelf that the Komodo dragon colonised, becoming isolated in their present island range as sea levels rose afterwards. Extinct Pliocene
California rock lizard ravens, and roadrunners. The genus "Petrosaurus" contains three species. California rock lizard The California rock lizards are a genus (Petrosaurus) of New World lizards in the family Phrynosomatidae. They are endemic to southern California and Baja California, Mexico. This type of lizard lives almost exclusively on rock outcrops, boulder piles, and canyon walls, where it shelters under rocks. The habitat is arid and semiarid foothills and canyons along the western margin of the Colorado Desert. The courtship begins shortly after emergence in early spring. The eggs are laid around June and July. The few predators that could pursue this lizard