Nick Garbutt / Female Capybara (Hydrochoerus hydrochaeris) swimming in line with young after escaping a Jaguar attack (Panthera onca palustris) in a lagoon off the Paraguay River. Taiama Ecological Reserve, Pantanal...

Nick Garbutt / Yacare Caiman (Caiman yacare) gaping to regulate its body temperature, with attendant hoverflies, the Paraguay River, Taiama Reserve, western Pantanal, Brazil, South America.

Nick Garbutt / Yellow Anaconda (Eunectes notaeus) in vegetation at the edge of the Paraguay River, Taiama Reserve, western Pantanal, Brazil, South America.

Franco Banfi / River stingray (Potamotrygon sp.), Paraguay River, Pantanal, Brazil

Franco Banfi / Streaked prochilod (Prochilodus lineatus), species native to the Parana-Paraguay and Paraiba do Sul river basins in South America. Recanto Ecologico, Rio da Prata, Bonito, Mato Grosso do Sul, Brazil

Franco Banfi / Red-bellied piranha (Pygocentrus nattereri), on a secondary river from the Paraguay River, Pantanal, Brazil

Franco Banfi / Red-bellied piranha (Pygocentrus nattereri), on a secondary river from the Paraguay River, Pantanal, Brazil

Franco Banfi / Water hyacinth, (Eichhornia sp.), from below the surface, Paraguay River, Pantanal, Brazil

Franco Banfi / River stingray (Potamotrygon sp.), Paraguay River, Pantanal, Brazil

Franco Banfi / River stingray (Potamotrygon sp.), Paraguay River, Pantanal, Brazil

Franco Banfi / Red-bellied piranha (Pygocentrus nattereri ), at night, in tributary of Paraguay River, Pantanal, Brazil

Franco Banfi / Boat loaded to travel the Paraguay river for exploration, Pantanal, Brazil