Bug Wiki
Sticker of Purple thorn
Bug card No. 3445 of 4,939

Purple thorn

Selenia tetralunaria
Eats: PlantsMothsForests and woods6 legs

The purple thorn is a dark purplish brown moth with jagged, angled wing edges. Each wing has a little white mark shaped like a comma. Its spring moths are bigger than its summer moths.

Lives in
Northern and central Europe, in woods and gardens
Wingspan
4.4 to 5.2 cm (1.7 to 2 in)
Top speed
about 16 km/h (9.9 mph)
Flying, estimate
Can it hurt you?
Harmless
Harmless. It cannot bite or sting.
What does it eat?
Its caterpillars eat the leaves of many trees and bushes, like birch, alder, oak, apple and rose.
For real!Photo of Purple thorn
Picture by Didier Descouens. CC BY-SA 4.0, via Wikimedia Commons.

How big is it?

How wide are its wings?

Purple thorn wings about 5.2 cm tip to tip (2 in)A toy building brick about 3.2 cm (1.3 in)A crayon about 9 cm (3.5 in)A banana about 18 cm (7.1 in)
wings as wide as 1.5 toy building brickscould fly across a whole football pitch in 24 seconds

How big is Purple thorn compared to YOU?

Just maths in your browser. Nothing is saved or sent anywhere.

How fast is it?

cool stuff

Fun facts

1

The spring moths fly in April and May. The summer moths fly in July and August and are smaller and darker.

2

It flies at night and is drawn to lights.

3

It spends the winter as a pupa.

4

It lives in Britain but not in Ireland.

you asked

Most asked questions about Purple thorn

?What does the purple thorn eat?

Its caterpillars eat leaves of trees and bushes like birch, oak, apple and rose.

?How big is the purple thorn?

Spring moths have a wingspan of 46 to 52 millimetres, summer moths 44 to 46 millimetres.

For bug experts

Scientific name
Selenia tetralunaria
Named by
Hufnagel, 1767
Group
Moths
Family
Geometridae
Classification
Insecta > Lepidoptera > Geometridae
Lives on
Europe

Where the facts come from

  1. Purple thorn (Wikipedia, CC BY-SA 4.0): what it looks like, where it lives, what it eats, sizes and fun facts, retold in simple words.
  2. Picture by Didier Descouens. CC BY-SA 4.0, Wikimedia Commons. The sticker of this bug is drawn from this picture.

If we got something wrong, sorry, we are bug fans, not a science journal. Tell us at [email protected] and we will fix it.

Bug Wiki honey jar For grown-ups: Bug Wiki is free, with no ads and no tracking. A small tip helps keep it online.Leave a tip

More from the same group: Moths

Also at home here: Forests and woods

Honey jarfor grown-ups