Summary table (Monkeys vs. Apes)

Table below and other related information found at the Human Society website: http://www.hsus.org/animals_in_research/chimps_deserve_better/monkey-use-in-research/apes_vs_monkeys_whats_the.html

Monkeys-baboons, macaques, tamarins, marmosets, etc.	Nonhuman Apes-chimpanzees, gorillas, orangutans, bonobos and gibbons
have tails (even if very short)	don't have tails
are naturally found in Africa, Asia, Central America and South America	are naturally found in Africa and Asia
have smaller bodies (1-45 lbs)	have larger bodies (13-215 pounds)
have a smaller body-to-brain ratio	have a larger body-to-brain ratio
have a shorter lifespan (10-50 years)	have a longer lifespan (35-60 years)
there are many species of monkeys, etc.	there are few species of nonhuman apes, etc.
usually walk on all four limbs	have more upright posture and the ability to walk on two legs