Not the most dynamic animal, the Capybara, or Hydrochoerus hydrochaeris, is still the largest rodent in the world. Found in high density in the Pantanal, capybara spend most of their time lazing around in large groups, occasionally grazing early in the morning or late in the day. Apparently, they're great swimmers and can even sleep underwater, keeping their nostrils just above of the surface to avoid predators or extreme heat. I've seen videos on youtube of jaguars attacking capybara, but on our recent trip to the Pantanal we saw both animals nearly side by side on the beaches of the Rios Cuiabá and Pirquiri. Note the Giant Cowbird on the Capybara in the last photo, evolutionarily speaking a more likely perch than a cow.