Giant panda years ago) from the main ursine stock; since it is the most basal member of the group, it is equidistant from all other extant ursids. The giant panda has been referred to as a living fossil. Despite the shared name, habitat type, and diet, as well as a unique enlarged bone called the "pseudo thumb" (which helps them grip the bamboo shoots they eat) the giant panda and red panda are only distantly related. The word "panda" was borrowed into English from French, but no conclusive explanation of the origin of the French word "panda" has been found. The closest
Giant panda and not the reason for, the dietary change. The mutation time for the T1R1 gene in the giant panda is estimated to 4.2 mya while fossil evidence indicates bamboo consumption in the giant panda species at least 7 mya, signifying that although complete herbivory occurred around 2 mya, the dietary switch was initiated prior to T1R1 loss-of-function. Pandas eat any of 25 bamboo species in the wild, such as "Fargesia dracocephala" and "Fargesia rufa". Only a few bamboo species are widespread at the high altitudes pandas now inhabit. Bamboo leaves contain the highest protein levels; stems have less. Because of