Butterflies resting on a caiman in the Pantanal, Brazil (© Frank Lukasseck/Corbis)

【October 29 2013】In the Pantanal, a massive tropical wetlands primarily in southwestern Brazil, caimans sun themselves on stretches of dry land. These butterflies are enjoying a sip of the salty fluids that collect around the caiman's nostrils and eyelids. The truth may sound a little gross, but those aren't crocodile tears--the caiman seems pretty happy about it all.Explore breathtaking Gallery from the HuluTrip homepage over the past 5 years..