The Red Worm That Turns Into a Butterfly 🦋

A caterpillar with disputed habitat

The asari' (الأساريع) — red caterpillars that live in herbs and shed their skins to become butterflies — earned a full entry in Al-Damiri's book, mostly because medieval scholars could not agree on what exactly they were. And the disagreement starts with the very pronunciation: the hamza takes a fatha — it's a-SARI', not i-SARI' — and the singular is asroo'.

Some described them as red-headed, white-bodied worms in the sand, "like the fingers of women" — a description recorded in al-Kifaya and confirmed by Ibn Qutayba in Adab al-Katib. Others placed them in the herbs and called them banat al-naqa, "the daughters of the she-camel." Ibn al-Sikkit insisted they live in the sand and molt into butterflies, while Ibn Malik devoted a whole linguistic treatise to whether the word should be asari' or yasari' — this is a book in which the grammar of worms received serious scholarship.

Al-Damiri catches what looks like a 1,000-year-old typo — my favorite find in this entry. Ibn Malik's book attributes to Ibn al-Sikkit the claim that the worm lives in herbs (baql) and molts into a butterfly. But al-Damiri checked Ibn al-Sikkit's actual work, Islah al-Mantiq — and there, Ibn al-Sikkit says they live in the sand (raml). Al-Damiri's conclusion: some copyist, somewhere in the chain of manuscripts, miscopied raml as baql. One slip of the pen, and centuries of scholars argued about whether the worm lives in sand or herbs — when the whole debate may rest on a scribe's bad handwriting. Medieval textual criticism, solving a cold case.

The thousand-year-old copying mystery

The book also corrects one popular mix-up: some people claimed the asari' were shahmat al-ard, "the fat of the earth" — but no, that is a different creature entirely, promised for a later chapter.

Eating them is forbidden (they count as insects), but the khawass — the "special properties" chapter where medieval medicine lives — credits the crushed worm with a startling power: smeared on a cut nerve or tendon, it heals it immediately, "with great benefit." That is the book's claim, not ours: a 700-year-old folk remedy, presented here as history, never as advice.

The dream interpreters had their own take. If the yasroo' shows up in your dreams, it means a thief who steals a little at a time, dresses himself in piety, and fools nobody — because, the book notes, this green worm of the cucumber vines and vineyards cannot hide its hypocrisy. The dream ends on the thief, exposed: a small red worm carrying a whole medieval worldview.

Frequently Asked Questions

1. What were the asari’ in Hayat al-Hayawan?

   The article describes the asari’ as red caterpillars or worms associated with herbs or sand. Some sources call them red-headed and white-bodied, like women’s fingers, while Ibn al-Sikkit says they molt into butterflies. Even the word’s pronunciation and singular form became subjects of scholarly debate.

2. What was the possible thousand-year-old typo?

   Ibn Malik’s text attributed to Ibn al-Sikkit the claim that the worm lived in herbs, or baql. Al-Damiri checked Ibn al-Sikkit’s own Islah al-Mantiq and found sand, or raml, instead. He concluded that a copyist may have substituted one word for the other, creating a false dispute.

3. What dream meaning is given for this caterpillar?

   The dream tradition interprets the yasroo’ as a thief who steals small amounts, dresses himself in piety and deceives nobody. The article connects this meaning with a green worm of cucumber vines and vineyards whose supposed hypocrisy remains visible rather than hidden. It is reported as medieval interpretation, not fact.