The northern blue-tongued skink's tongue does more than look blue — it strongly reflects ultraviolet light, with the rear reflecting roughly twice as much as the front. Normally camouflaged, it gapes its mouth at predators to flash the UV-bright rear in a deimatic display.
Stenocara, a beetle from the Namib Desert, collects drinking water from fog. Its wing covers mix water-attracting bumps, where droplets grow, with water-repelling channels that guide them to its mouth. Described in Nature in 2001, the structure inspired biomimetic fog collectors.
In 1980s Australia, male beetles were found mating with beer bottles. The brown color, size, and bumps on the bottles mimicked female beetles, acting as a "supernormal stimulus." When this threatened the species, Australian breweries redesigned their bottles, removing the bumps.