The famous Green Anaconda is the world's heaviest snake and the second longest. It is found in swamps and wetlands of the Amazon Basin. Serpentario Armero, Leticia, Colombia. In context at www.dixpix.ca/Amazon/fauna/snakes/index.html
The Rainbow Boa or Boa Arcoiris is found from southeastern Bolivia to northern Argentina, preferring more open areas. Serpentario de Mendoza, Argentina.