Frit Fly vs Owl Butterfly

Side-by-side species comparison

Attribute Frit Fly Owl Butterfly
Scientific Name Oscinella frit Caligo memnon
Order Diptera Lepidoptera
Family Chloropidae Nymphalidae
Size 1.5-2 mm Wingspan 120-160mm
Habitat Farmland Farmland
Diet Herbivores Herbivores
Regions Europe, temperate worldwide South America, North America
Conservation Least Concern Least Concern

Frit Fly

A tiny fly that is a major pest of oat crops and ryegrass. Larvae bore into plant stems causing 'dead heart'. Named from the Swedish word for grain. Multiple generations per year.

💡

Did You Know?

Despite being only 1.5mm long, it can destroy entire crops of oats by killing the growing shoot inside each stem.

Owl Butterfly

A very large tropical butterfly with enormous owl-eye patterns on the underside of its hindwings. The uppersides are deep blue-purple.

💡

Did You Know?

The large eyespots on its underwings closely resemble the face of a screech owl which startles would-be predators.