a large dark-bodied lizard, the male of which has a light yellow tail, native to the deserts of the south-western US and Mexico. When threatened it inflates itself with air to wedge itself into a crevice 变色蜥
Sauromalus obesus, family Iguanidae 拉丁名Sauromalus obesus,美洲鬣蜥科
语源
late 19th cent.: from Mexican Spanish chacahuala, from American Indian