Until recently it was thought that albatross were predominantly surface feeders, swimming at the surface and snapping up squid and fish pushed to the surface by currents, predators, or death. The deployment of capillary depth recorders, which record the maximum dive depth undertaken by a bird (between attaching it to a bird and recovering it when it returns to land), has shown that while some species, like the wandering albatross, do not dive deeper than a metre, some species, like the light-mantled albatross, have a mean diving depth of almost 5 m and can dive as deep as 12.5 m.[26] In addition to surface feeding and diving, they have also been observed plunge diving from the air to snatch prey.[27]