| Description | large for rodents; large heads relative to their bodies; rounded rumps; no tail of any consequence; this appearance may have led to being thought of as pigs |
| Sex | difficult, but not impossible, to distinguish male from female |
| Age | 4-5 years in the wild; up to 8 years in captivity; oldest known guinea pig was 14 years, 10.5 months |
| Length | 8-10" |
| Wingspan | |
| Weight | 1.5-2.5 lbs. |
| Habitat | grassy plains; seeks shelter in the burrows of other animals, as well as crevices and tunnels formed by vegetation |
| Status | least concern; kept extensively as pets |
| Range | South America as early as 5000 BC: originated in the Andes (Ecuador, Peru, Bolivia); dispersed to other parts of the world by early traders in the mid 1500s |
| Behavior | In the wild â?? live in small groups consisting of several females (sows), a male (boar), and the young (pups); they move together in groups (herds) eating grass or other vegetation, and do not store food; crepuscular (most active at dusk and dawn); easily startled and will freeze in place or run for cover; often perform little hops in the air (known as "popcorning"); easily domesticated if handled early, and make excellent pets; can produce up to five litters per year; gestation 59-72 days; litters of 1-6 pups; pups are well-developed and immediately mobile and eating solid foodâ??though they continue to suckle |
| Diet | grass and vegetation in the wild |
| Vocalization | known for a variety of calls: Wheek, Bubbling or Purring, Rumbling, Chutting and Whining, Chattering, Squealing or Shrieking, and Chirping |
| Other Information | Pet guinea pigs learn to recognize their owners and often greet them with an excited "Wheek"; they also "Wheek" when they hear the sound of the refrigerator door and the rustle of a bag that signals their food is coming |