Chris Mattison / Wall crab spider (Selenops sp.), also known as a 'flattie', Cederberg Mountains, South Africa

Paul Bertner / Flattie (Selenopidae) spider camouflaged on tree, Cuc Phuong National Park, Vietnam

Paul Bertner / Flattie (Selenopidae) spider camouflaged on tree, Cuc Phuong National Park, Vietnam

MYN / Joao P. Burini / Spider (Selenops sp) Piedade, Sao Paulo, Brazil, Tropical rainforest, May. meetyourneighbours.net project

Philippe Clement / Wall crab spider (Selenopidae sp) camouflaged on tree bark, Kruger NP, South Africa

Piotr Naskrecki / Mantid (Liturgusa annulipes) and Flattie (Selenopidae) camouflaged against lichen and moss-covered tree, Costa Rica

Paul Bertner / Flattie (Selenopidae) juvenile camouflaged on bark, Nuqui, Colombia

Paul Bertner / Flattie (Selenopidae) juvenile camouflaged on bark, Nuqui, Colombia

Paul Bertner / Flattie (Selenopidae) spider camouflaged on bark, Sani Lodge, Ecuador

Roman Willi / Wall crab spider (Selenops sp.) male, portrait, Osa Peninsula, Costa Rica. Focus stacked image.