Every year around nov/dec, millions of red crabs migrate to the beach where they hook up, breed, release their eggs into the ocean. Their migration can last up to 18 days. It's long, perilous, and spectacular. What impresses me the most, however, about their journey is the relentlessness. Along the way they get gobbled up by birds, squashed by cars, but they stay consistent on their path; i.e. after running across a road frogger-ing its way across, one of them will rest for a bit, collect its breath, and move on. Sure you can downplay all this by pointing at their frontal-loblessness, but even in the wild you'll see animals place their own survival above all; mothers will ditch their young (or even eat them) just to live on. But these guys will risk their own life & limb to extend their race, stopping at nothing.
