Science Visualized Animals

Frog and toad pupils mainly come in seven different shapes

Analyzing over 3,200 species revealed diamonds, fans and more

Hyloscirtus tigrinus frog eye up close

The pupil shapes of frogs (Hyloscirtus tigrinus, shown) and toads generally didn’t correspond with particular habitats or habits.

Santiago R. Ron

By Carolyn Wilke

- More than 2 years ago

Frog and toad pupils come in quite the array, from slits to circles. But overall, there are seven main shapes of these animals’ peepholes, researchers report in the Aug.