Jumping Spider: image courtesy of Science/AAAS

To figure out how far away our dinner plate is our brain melds the slightly different images coming from our two eyes. Other creatures, including many insects, move their heads to glean how far a piece of food might be. But jumping spiders ( Hasarius adansoni ) don’t seem to possess either of these abilities. So how do they manage such quick and exacting lunges to capture their lunches?