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Sticker of Bird-dropping spider
Bug card No. 0112 of 1,500

Bird-dropping spider

Celaenia excavata
Eats: Other bugs and small animalsSpidersGardens and meadows8 legsNot an insect, but a bug cousin

The bird-dropping spider has a very clever disguise: it looks just like a blob of bird poo. Birds do not want to eat that, so they leave it alone. It sits perfectly still all day and comes alive at night.

Fun fact: spiders are not insects. Insects have six legs, spiders have eight. Everyone calls them bugs anyway!
Lives in
Eastern and southern Australia, also New Zealand, often in gardens
Length
0.2 to 1.2 cm (0.1 to 0.47 in)
Top speed
about 1.3 km/h (0.81 mph)
On foot, estimate
What does it eat?
It eats almost only male moths. It tricks them by giving off the same smell as a female moth, and grabs them when they come close.
For real!Photo of Bird-dropping spider
Picture by unknown author. CC BY-SA 3.0, via Wikimedia Commons.

How big is it?

How long is it?

Bird-dropping spider 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 run across a dinner table in 2.8 secondsmoves 30 times its own body length every second

How big is Bird-dropping spider compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

The female is about 12 millimetres long, but the male is tiny, only about 2.5 millimetres.

2

At night it hangs from a single silk thread and catches moths with its strong front legs.

3

Its egg sacs are brown marbled balls, each holding more than 200 eggs.

4

It can join up to 13 egg sacs together with silk and wait for food underneath them.

you asked

Most asked questions about Bird-dropping spider

?Why does the bird-dropping spider look like poo?

So that birds, its main enemies, think it is just a dropping and leave it alone.

?What does the bird-dropping spider eat?

Almost only male moths, which it lures with a smell like a female moth.

For bug experts

Scientific name
Celaenia excavata
Group
Spiders
Family
Araneidae
Classification
Arachnida > Araneae > Araneidae
Lives on
Australia and Oceania

Where the facts come from

  1. Celaenia excavata (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 unknown author. CC BY-SA 3.0, 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: Spiders

Also at home here: Gardens and meadows