Molly
tha animal sare called white lipped peccary and they do travel in very large heards.
i actually live in guyana and worked for many years for the company who organised the trip for ben. the area they were in I use to rund jungle survival and other extreme jungle trips. there are two types of peccary the collared peccary, smaller, less aggressive and smaller herds and the white lipped. they are bigger, travel in large herds, stink bad and grind their teeth when feeling aggresive. If they attach you need to get up a tree because although they have poor eye sight, if they do catch sight of you, the whole crowd attacks. they are probably the biggest risk to you in the jungle from any animal save the likes of mosquitos. anacondas, Caimen, Jaguar, Piranha all are very, very little risk, the peccary can be bad for your health. Easy to avoid though as you smell them a long ay off and all you need do is a climb a tree a few feet and you're afe and thankfully there are lots of trees in the jungle.
the local guys still hunt them with bow and arrow to put food on the table. our websiter has a few ******* of them i think. www.bushmasters.co.uk
All the best
ian