Polarisation vision in the dark : Green-sensitive photoreceptors in the nocturnal ball-rolling dung beetle Escarabaeus satyrus
Many insects utilise the polarisation pattern of the sky to adjust their travelling directions. The extraction of directional information from this sky-wide cue is mediated by specialised photoreceptors located in the dorsal rim area (DRA). While this part of the eye is known to be sensitive to the ultraviolet, blue or green component of skylight, the latter has only been observed in insects activ
