If you're talking about the Capivara , here's what I got from Wikipedia:
"Adult capybaras grow to 106 to 134 cm (3.48 to 4.40 ft) in length, stand 50 to 62 cm (20 to 24 in) tall at the withers, and typically weigh 35 to 66 kg (77 to 146 lb), with an average in the Venezuelan llanos of 48.9 kg (108 lb). The top recorded weights are 91 kg (201 lb) for a wild female from Brazil and 73.5 kg (162 lb) for a wild male from Uruguay"
They say that their meat tastes almost like pig or wild hog, very strong taste and scent,
Some people even marinate it in "water,bicarbonate,lemon" solution to make it easier to deal with (for the faint hearted this is not something easy to eat, but if done correctly it's an amazing meat and the secret lies in the seasoning , all that's needed is lemon salt and pepper)