Flying gecko Flying gecko

Geckos have eyesight comparable to a cat, giving them the best eyesight of all lizards. The flying gecko has an unusual scalloped pupil. When fully contracted, the pupil can close completely—except for a few tiny pinholes where the scalloped edges do not quite meet.

What's different about the nocturnal eye?

Photo: Visuals Unlimited/© Joe McDonald.

Night Vision | Zoology After Dark
Resources | Guide | Transcript | Night Creatures Home

Editor's Picks | Previous Sites | Join Us/E-mail | TV/Web Schedule
About NOVA | Teachers | Site Map | Shop | Jobs | Search | To print
PBS Online | NOVA Online | WGBH

© | Updated November 2000

Support provided by

For new content
visit the redesigned
NOVA site