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Sticker of Black firefly
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Black firefly

Lucidota atra

The black firefly is a firefly that is busy in the daytime instead of at night. It is black with a red and yellow shield over its head. Funny thing: the grown-ups do not glow, but their babies do.

Lives in
Eastern North America, west to Kansas and Texas and south to Mexico, in open forests and shady places
Length
0.9 to 1.2 cm (0.35 to 0.47 in)
Top speed
about 3 km/h (1.9 mph)
Flying, estimate
Can it hurt you?
Harmless
Harmless. It does not bite or sting.
What does it eat?
Its larvae hunt soft little animals like snails and slugs in damp, rotting wood.
For real!Photo of Black firefly
Picture by xpda. CC BY-SA 4.0, via Wikimedia Commons.

How big is it?

How long is it?

Black firefly about 1.2 cm long (0.47 in)A grain of rice about 6 mm (0.24 in)A toy building brick about 3.2 cm (1.3 in)
as long as 2 grains of rice in a rowcould fly across a whole football pitch in 130 secondsmoves 69 times its own body length every second

How big is Black firefly compared to YOU?

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

How fast is it?

cool stuff

Fun facts

1

The males fly low through the forest around midday, looking for females sitting on low plants.

2

A male finds a female by smelling her with his big, saw-edged feelers.

3

Its eyes are smaller than those of fireflies that fly at night.

4

Its eggs hatch after about two or three weeks.

5

Its larvae cannot fly. They live in moist places, especially in rotting wood.

you asked

Most asked questions about Black firefly

?Does the black firefly glow?

The grown-ups do not, but the larvae do glow.

?When is the black firefly active?

In the daytime, mostly from late morning to early afternoon in early summer.

?What does the black firefly eat?

Its larvae hunt snails and slugs.

For bug experts

Scientific name
Lucidota atra
Group
Beetles
Family
Lampyridae
Classification
Insecta > Coleoptera > Lampyridae
Lives on
North America
Also known as
Woodland lucy

Where the facts come from

  1. Lucidota atra (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 xpda. CC BY-SA 4.0, 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 [email protected] and we will fix it.

More from the same group: Beetles

Also at home here: Forests and woods