They have a deadly bite, but a soft footfall. Tarantulas, it turns out, can spin silk with their feet.
To crawl vertically and cling upside down, most spiders use minute claws and pads on their feet or “tarsi”. These work on rough surfaces, but may fail on smooth or dirty ones. While this is not a problem for small spiders that can survive long falls, for a heavy tarantula a slip could be fatal.
To figure out how tarantulas make their way safely up vertical surfaces, Adam Summers of the University of California, Irvine, and colleagues analysed the footprints of…
