Paper short abstract:

Chimpanzee hunting behavior has been observed through their ranges. Meanwhile, local differences have been found in this behavior. For example, blue duikers were hunted by chimpanzees in Tanzania, whereas chimpanzees in Ivory Coast did not hunt them. These common features and local differences of this behavior will be discussed.

Paper long abstract:

Chimpanzee (Pan troglodytes) hunting behavior has been observed through their inhabited ranges irrespective of the vegetation types. The main targets of chimpanzee hunting were sympatric primates and red colobus monkeys (Procolobus badius) were most frequently hunted where chimpanzees and this species occurred sympatrically. Meanwhile, local differences have been found on this behavior. For example, blue duikers (Cephalophus monticla) were hunted by chimpanzees at the Gombe National Park and the Mahale Mountains National Park in Tanzania, whereas chimpanzees at the Tai forest in Ivory Coast did not hunt them in spite of blue duikers inhabiting there. Although population densities of red-tailed monkeys (Cercopithecus ascanius) were the almost same as these of red colobus monkeys at Mahale, frequencies of chimpanzee hunting were different: red colobus monkeys were frequently or regularly hunted by chimpanzees but red-tailed monkeys were not. Also, local differences of interspecific relationships between chimpanzees and red colobus monkeys and the technic of chimpanzee hunting on red colobus monkeys have been found. These common features across their inhabited ranges and local differences of chimpanzee hunting will be discussed.