Land Michael F, Osorio Daniel C
School of Biological Sciences, University of Sussex, Brighton BN1 9QG, UK.
Curr Biol. 2003 Feb 4;13(3):R83-5. doi: 10.1016/s0960-9822(03)00031-9.
Humans lose colour vision at night and it has often been assumed that this happens to other animals as well. It is not true of nocturnal moths, however: a recent study has shown that the elephant hawk moth makes use of trichromatic colour vision when seeking flowers by starlight.