Philippine long-tailed macaque height of 40–50 cm (16–20 in). It is the size of a domestic cat. Male macaques weigh 4–8 kg, but females only attain 3–4 kg. The Philippine long-tailed macaque is found in all major Philippine island groups (Luzon, Visayas, Mindanao). However, though assessed Near Threatened, it is actually in serious retreat or already extinct in much of its original range. For instance, in Olongapo in Zambales Province (western central Luzon), where a patch of old-growth forest remains, the monkeys have found some refuge; however, they are often road killed, accidentally electrocuted by live wires, and sometimes stoned. Philippine long-tailed macaque
Rhesus macaque between the central and peripheral males. A subgroup of subordinate, often subadult, males occupy the very edge of the groups, and have the responsibility of communicating with other macaque groups and making alarm calls. Rhesus social behaviour has been described as despotic, in that high-ranking individuals show little tolerance and frequent and often severe aggression towards non-kin. Rhesus macaques interact using a variety of facial expressions, vocalizations, body postures, and gestures. Perhaps the most common facial expression the macaque makes is the "silent bared teeth" face. This is made between individuals of different social ranks, with the lower-ranking one giving