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Sticker of Shamrock spider
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Shamrock spider

Araneus trifolium
Name means: “trifolium is Latin for three-leaf, because the pattern on its back looks like a clover leaf”
Eats: Other bugs and small animalsSpidersGardens and meadows8 legsNot an insect, but a bug cousin

The shamrock spider is a round, chubby orb-weaver with striped legs. Its big round tummy can be white, yellow, green, maroon or orange, with pale spots that look like a clover leaf. It builds a big round web in tall plants.

Fun fact: spiders are not insects. Insects have six legs, spiders have eight. Everyone calls them bugs anyway!
Lives in
Across North America, from Alaska and Canada to the USA, in fields and meadows
Length
0.4 to 2 cm (0.16 to 0.79 in)
females are much bigger than males
Top speed
about 1.7 km/h (1.1 mph)
On foot, estimate
What does it eat?
It catches flying insects in its web, like grasshoppers, bees, butterflies and moths.
For real!Photo of Shamrock spider
Picture by xpda. CC BY-SA 4.0, via Wikimedia Commons.

How big is it?

How long is it?

Shamrock spider about 2 cm long (0.79 in)A grain of rice about 6 mm (0.24 in)A toy building brick about 3.2 cm (1.3 in)A crayon about 9 cm (3.5 in)
as long as 3 grains of rice in a rowcould run across a dinner table in 2.1 secondsmoves 24 times its own body length every second

How big is Shamrock spider compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

It does not sit in the middle of its web. It hides in a folded leaf tied up with silk.

2

A special signal thread runs from its hiding place to the web, so it can feel when something gets caught.

3

Its web hangs about half a metre to 2 metres above the ground, often on goldenrod.

4

A mother makes an egg sac with several hundred eggs inside, wrapped in thick silk.

5

The adults die in winter, and only the eggs wait for spring.

you asked

Most asked questions about Shamrock spider

?How big is a shamrock spider?

Females are about 1 to 2 centimetres long, and males are much smaller.

?When can I see shamrock spiders?

The big adults are easiest to find in September and October.

For bug experts

Scientific name
Araneus trifolium
Named by
Hentz, 1847
Group
Spiders
Family
Araneidae
Classification
Arachnida > Araneae > Araneidae
Lives on
North America
Also known as
Shamrock orbweaver

Where the facts come from

  1. Araneus trifolium (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 hello@bugwiki.app and we will fix it.

More from the same group: Spiders

Also at home here: Gardens and meadows