Spontaneous discrimination of natural stimuli by chimpanzees (Pan troglodytes)
Six chimpanzees ( Pan troglodytes) were presented with pairs of color photographic images of 5 different categories of animals (cat, chimp, gorilla, tiger, fish). The subjects responded to each pair using symbols for “same” and “different.” Both within- and between-category discriminations were tested, and all chimpanzees classified the image pairs in accordance with the 5 […]
Recognition of partially concealed leopards by wild bonnet macaques (Macaca radiata) The role of the spotted coat
Wildbonnetmacaques (Macacaradiata) have been shown to recognize models of leopards (Panthera pardus), based on their configuration and spotted yellow coat. This study examined whether bonnetmacaques could recognize the spotted and dark melanic morph when partiallyconcealed by vegetation. Seven troops were studied at two sites in southern India, the Mudumalai Wildlife Sanctuary and the Kalakad-Mundanthurai Tiger […]