Spot the Frippet: ocellus.

An ocellus is a simple eye, or something that looks like an eye.

Insects have them:


eyes of a house fly. Photo by Sanjay Achara https://commons.wikimedia.org/wiki/User:Sanjay_ach

...and butterflies sometimes have more than two.


photo of a Peacock butterfly by Tony Hisgett https://www.flickr.com/people/37804979@N00

Peacocks are famous for flouncing about with loads of the things, and so does the Argus pheasant:

illustration by T W Wood from Darwin's The Descent of Man


...as do some leaves and types of fungus.

There. 

I'm beginning to wonder if I've ever been a day without seeing one.

Spot the Frippet: ocellus. This word is Latin for small eye, from oculus, which means eye.