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An ocellus (plural ocelli) is a simple eye common on insects, and is often used to distinguish this secondary eye from the compound or main eyes elsewhere.  Pictured above is a chlorion aererium, a type of wasp with massive compound eyes and three ocelli on the top of its head.  Other invertabrates, such as spiders, have multiple ocelli and no compound eyes:

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Ocelli can also refer to false eyes on animals and insects as decoy or decoration: 

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The word ocelli is the diminutive of the Latin word oculus, meaning eye, which comes from the Proto Indo European root *okw- meaning to see.  

Don’t forget to open this page in its own window to see more related content and lots of great links to ocelli images and pages.  Then share, like, reblog, repost and generally tell all your friends.

Image of bee ocelli by Sam Droege of the US Geologic Survey Bee Inventory and Monitoring Lab.  For tons of incredibly cool bee and wasp images bee sure to check out the flickr page.

Image of spider ocelli on phidippus audax courtesy colin carmichaels, used with permission under a Creative Commons 3.0 license.  

Image of ocelli on a Glad-eye bush brown courtesy Ajith U, used with permission under Creative Commons 3.0 license.  

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