Giant pandas (Ailuropoda melanoleuca) have an opposable thumb that has been called a false thumb. Rather than consisting of the distal and proximal phalange bones, the panda's false thumb is an enlarged carpal bone one of the many bones that together form the wrist.
Arboreal or tree-dwelling frogs of the family Phyllomedusa are one of only two non-mammals to make our list. These arboreal amphibians, which have a penchant for laying their eggs in a leafy parcel, can be found in Argentina and Panama.
Lemurs are primates found only on the island of Madagascar and a few other islands off the coast of Africa. The smallest of the 100 or so lemur species is only 3 inches in length, while others are several feet tall.
The great apes, including the gorilla, chimpanzee, bonobo, orangutan, and lesser apes called gibbons, all have opposable thumbs. In fact, they take opposable digits a step further - the big toe of the foot is opposable as well!
A few New World monkeys - those living in the Americas - have opposable thumbs. These include the saki, ukari, tamarin, woolly monkey, night monkey, owl monkey, capuchin, and squirrel monkeys.
The koala, the famed marsupial of Australia, is unlike any other animal in that it actually has two opposable thumbs. These thumbs are set at an angle to the three fingers. The koala uses these two sections of its hand the thumbs and fingers to securely grasp.