PREMAPHOTOS / Noctuid moth caterpillar (Noctuidae). When alarmed it hides its red head under its body and rears its tough rear end, which has two eyespots like a false head, in rainforest, Sumatra

Colin Monteath / Mt Tasman in mist rears above Fox Glacier, Westland National Park, Southern Alps, New Zealand

Robert Valentic / Eastern brownsnake (Pseudonaja textilis) sub-adult female rears up in a defensive display. Campbellfield, Victoria, Australia. Controlled conditions.