Bug Wiki
Sticker of Twenty-spotted ladybird
Bug card No. 1381 of 1,500

Twenty-spotted ladybird

Psyllobora vigintimaculata
Eats: Fungus and mouldLadybirdsGardens and meadows6 legs

The twenty-spotted ladybird is a tiny white ladybird covered in dark or orange spots. On the part behind its head it has dark spots shaped like the letter M. Unlike most ladybirds, it does not eat bugs. It eats a white powdery mould that grows on leaves.

Lives in
North America, from Newfoundland and Alaska down to Louisiana and southern California
Length
1.8 to 3 mm (0.07 to 0.12 in)
Top speed
about 21 km/h (13 mph)
Flying, estimate
Can it hurt you?
Harmless
Harmless. It is tiny and cannot hurt you.
What does it eat?
It eats powdery mildew, a white dusty mould that grows on plant leaves and makes them sick.
For real!Photo of Twenty-spotted ladybird
Picture by Judy Gallagher. CC BY 2.0, via Wikimedia Commons.

How big is it?

How long is it?

Twenty-spotted ladybird about 3 mm long (0.12 in)A grain of rice about 6 mm (0.24 in)
small enough to sit on your fingernailcould fly across a whole football pitch in 18 secondsmoves 1900 times its own body length every second

How big is Twenty-spotted ladybird compared to YOU?

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

How fast is it?

cool stuff

Fun facts

1

It is so small, only up to 3 millimetres long, that it could sit on a grain of rice.

2

It finds sick, mouldy plants by smell.

3

Farmers might one day use it instead of sprays to keep powdery mildew off their crops.

4

It can live for one or two years.

5

Its larva starts out white and hairy and gets a dark stripe as it grows.

you asked

Most asked questions about Twenty-spotted ladybird

?What does the twenty-spotted ladybird eat?

Powdery mildew, a white mould that grows on leaves.

?How big is the twenty-spotted ladybird?

Tiny, only about 2 to 3 millimetres long.

?Does it really have twenty spots?

Its name says twenty, and it has lots of dark or orange spots on a white back.

For bug experts

Scientific name
Psyllobora vigintimaculata
Named by
Say, 1824
Group
Ladybirds
Family
Coccinellidae
Classification
Insecta > Coleoptera > Coccinellidae
Lives on
North America
Also known as
Twenty-spotted lady beetle

Where the facts come from

  1. Psyllobora vigintimaculata (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 Judy Gallagher. CC BY 2.0, Wikimedia Commons. The round sticker of this bug is cut from the same picture.

If we got something wrong, sorry, we are bug fans, not a science journal. Tell us at hello@bugwiki.app and we will fix it.

More from the same group: Ladybirds

Also at home here: Gardens and meadows