Eye-spot (mimicry)

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Moth Automeris io shows startle display on its rear wings
A serval from behind, with ocelli on the back of its ears. Kits can see their mother as she moves in the long grass

An eye-spot (or ocellus) is an eye-like marking on the body of an animal. They are found on butterflies, reptiles, felids, birds and fish.

Eye-spots may be a form of mimicry: the spot looks like the eye of a larger animal. Its function may be to draw a predator's attention away from the most vulnerable body parts; or to look like an unpleasant or dangerous animal.[1][2]

In larger animals, eyespots may play a role in intraspecies communication or courtship – the best-known example is probably the eyespots on a peacock's display feathers.

There is evidence that eyespots in butterflies are anti-predator defences. Some are deimatic displays to distract, startle or scare off predators, or at least to deflect attacks away from vital body parts.[3][4] Butterfly eyespots may also play a role in mate recognition and sexual selection,[5] like the eyespots on larger organisms.

References[change | change source]

  1. Stevens, Martin (2005). "The role of eyespots as anti-predator mechanisms, principally demonstrated in the Lepidoptera". Biological Reviews 80 (4): 573–588. doi:10.1017/S1464793105006810. PMID 16221330. 
  2. Stevens, Martin & Ruxton, Graeme D. 2014. Do animal eyespots really mimic eyes? Current Zoology 60, 1, p26. [1]
  3. Vallin A. et al (2005). "Prey survival by predator intimidation: an experimental study of peacock butterfly defence against blue tits". Proceedings Royal Society: Biological Sciences 272 (1569): 1203–1207. doi:10.1098/rspb.2004.3034. 
  4. "Female butterflies chase males when it's cool". Sify.
  5. Costanzo K. & Monteiro A. (2006). "The use of chemical and visual cues in female choice in the butterfly Bicyclus anynana". Proceedings Royal Society: Biological Sciences 274: 845–851. doi:10.1098/rspb.2006.3729.