Back to Costa Rica for today’s photo of the day. These two squirrel monkeys were photographed just outside the lodge that I was staying at in Pavones, near the Panama border. Squirrel monkeys travel in large troops, sometimes up to 500. They are very small, growing to just about 13 inches (not including the tail) and weighing just 2 and a half pounds. Falcons and eagles are their main predators, but the fact that they travel in such large groups enables them to fend off most attacks. And just in case you needed one more wikipedia interesting fact of the day — “Female squirrel monkeys have a pseudo penis that they use to display dominance over smaller monkeys, in much the same way the male squirrel monkeys display their dominance.” Just in case you were wondering.