I was with a group of conservationists driving on a highway through a national park in Sao Paulo state, when all of the sudden the van stopped and everyone started yelling. A male three-toed sloth had tried to cross the highway and got caught at the median strip, not able to cross over the concrete barrier dividing the highway or cross back to where he came from - certain death for a slow-moving animal like a sloth. My friends picked up the creature by the nape of neck and the rump, crossed the highway, and placed him in the safety of a tree. It's usually hard to see sloths as they are typically well hidden in the forest canopy. This was an amateur photographer's dream come true - wildlife just a few feet from the camera moving so slowly you can't help but take a decent shot. I think he is thanking us in this photo.