A tenebrionid beetle, Onymacris rugatipennis, it buried itself one moment and then rushed forth again, as if skating along the surface of infinite sand grains.

• 我们还看见一种拟步行虫（Onymacrisrugatipennis）一下子把自己埋进沙地，一下子又向前冲，好像在无垠的沙地上溜冰，动作之快，我几乎来不及抢拍牠的模样。