As some of the most vital sensory organs among insects, it's no wonder that antennae come in a great variety of shapes and sizes to suit their various specializations. Here, a male Callirhipid beetle displays his extravagant feelers which are over half the length of his body. Like the feathery antennae of some male moths, this shape is designed to maximize the surface area to enable detection of even the faintest pheromones of distant females. However, unlike moths, these 'flabellate' (fan-like) antennae can be neatly folded away for protection when they're not needed, such as when the beetle is burrowing under bark or in rotten wood. Sarawak, Malaysia (Borneo).