Compare and contrast between apes and elephants.

Elephants have joined a small, elite group of species-including humans, great apes and dolphins-that have the ability to recognize themselves in the mirror, according to a new finding by researchers at the Yerkes National Primate Research Center, Emory University, and the Wildlife Conservation Society (WCS) in New York. This newly found presence of mirror self-recognition in elephants, previously predicted due to their well-known social complexity, is thought to relate to empathetic tendencies and the ability to distinguish oneself from others, a characteristic that evolved independently in several branches of animals, including primates such as humans.

This collaborative study by Yerkes researchers Joshua Plotnik and Frans de Waal, PhD, director of Yerkes' Living Links Center, and WCS researcher Diana Reiss, PhD, published in the early online edition of the current issue of Proceedings of the National Academy of Sciences of the United States of America, was conducted as part of a wide array of cognitive and behavioral evolution research topics at Yerkes' Living Links Center.

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