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Sticker of Alexander beetle
Bug card No. 0041 of 4,939

Alexander beetle

Megadromus antarcticus

The Alexander beetle is a big black beetle with shiny green edges that shimmer in the light. It cannot fly, but its long, thin legs make it a fast runner. It lives only in one part of New Zealand.

Lives in
Only in the Canterbury region of New Zealand, in gardens, fields and forests
Length
2.2 to 3.4 cm (0.87 to 1.3 in)
Top speed
about 1.6 km/h (0.99 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless. It hunts slugs and bugs, not people. Just watch it run.
What does it eat?
It hunts all kinds of small insects and larvae. It also eats slugs that farmers do not like.
For real!Photo of Alexander beetle
Picture by Max Curnow. CC BY-SA 4.0, via Wikimedia Commons.

How big is it?

How long is it?

Alexander beetle about 3.4 cm long (1.3 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)
as long as 6 grains of rice in a rowcould run across a dinner table in 2.2 seconds

How big is Alexander beetle compared to YOU?

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

How fast is it?

cool stuff

Fun facts

1

The mother guards her eggs in a little egg room for three to four weeks and does not even leave to eat.

2

It helps farmers by eating slugs. In one test it ate about one slug every two days.

3

Owls called moreporks and birds of prey called harriers like to eat it.

4

Wide rivers with many channels are hard for it to cross, because it cannot fly over them.

5

Tiny mites have been found living on its body.

you asked

Most asked questions about Alexander beetle

?Where does the Alexander beetle live?

Only in the Canterbury region of New Zealand. It is often found in home gardens.

?How big is the Alexander beetle?

It is 22 to 34 millimetres long, so about 2 to 3.5 cm.

?What does the Alexander beetle eat?

It hunts insects, larvae and slugs.

For bug experts

Scientific name
Megadromus antarcticus
Group
Beetles
Family
Carabidae
Classification
Insecta > Coleoptera > Carabidae
Lives on
Australia and Oceania

Where the facts come from

  1. Megadromus antarcticus (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 Max Curnow. 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.

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