head of green anaconda eunectes murinus

amazon america amusing anaconda animal animalia biology boa brazil closeup common constrictor creature danger dangerous deadly eunectes evolution exotic extant fauna giant green head heaviest herpetology huge known longest marshes murinus native nature nonvenomous one organism orinoco poisonous predator rainforest reptile reptilian snake snakebite south species stream sucuri swamp tropical water wild wildlife zoo zoology