This large and diverse family of moths includes more than 20,000 described species, with many more yet to be named.

They are mostly slender-bodied insects with relatively large wings often resting flat on the substrate.

Geometridae are known to mimic the appearance of:

  • bird droppings
  • leaves
  • distasteful butterflies

Geometrid larvae are important forest herbivores and most feed on particular species of plant, but some are specialist feeders on lichens and a few are predators of other invertebrates. 

They are often called looper caterpillars after their characteristic looping gait. 

About the name

Geometridae are often known as 'Looper moths', refering to the larvae, which sometimes lack front legs, making them move in a looping fashion.