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pedro iranzo · bcn
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📓 Blog / The spider
2026-05-28

One day, this spider appeared behind a leaf:

Typical shape, legs and colours of a crab spider
Typical shape, legs and colours of a crab spider

It is probably a Thomisus onustus, a crab spider:

Spiders in this family are called “crab spiders” due to their body shape, behavior of holding their two front pairs of legs apart from the two rear pairs, and their ability to scuttle sideways or backwards, resembling true crabs.

These spiders do not spin webs, they hunt. They camouflage themselves, especially in flowers, and wait for an insect to come close before striking.

Hidden among cactus flowers
Hidden among cactus flowers

I couldn’t help feeding her, making her an official pet.

Digesting a fly on a flowerpot
Digesting a fly on a flowerpot

Enjoying a blue bee
Enjoying a blue bee

Her white colour means she is a female. She must have arrived on the terrace ballooning, looking for new territory.

Mode: Leave me alone
Mode: Leave me alone

When the cactus flowers dried up, I found her in the bougainvillea.

The 4 shorter back legs
The 4 shorter back legs

The crab-shaped front legs
The crab-shaped front legs

On a bract
On a bract

After a little over a month, and a heavy storm, I never saw her again. I like to think that just as she came, she left, also flying. 🌬️