Index · Naturae
A wearable archive

Lost, but
not forgotten.

Eight species the world let end. Black cap, red code.

Black six-panel cap with a small embroidered dodo on the left front panel
IN 1.90.01 · Dodo · Raphus cucullatus · lost c. 1662
The code ↓
The catalogue was always coded. Now the hat is too.

Read the call number.

Every Index Naturae cap carries its call number embroidered on the strap — a small license plate from the archive. Two things about that number tell you what you are wearing.

The letter names the archive: IN, the natural world as it is — or AN, the Arcanum, the archive of legend.

The thread names the status: white thread means present, real, still here. Red thread means gone.

Collection I is stitched entirely in red.

White thread — presentRed thread — gone
INthe natural world REAL · ALIVEthe living archive — snowy owl, bald eagle, scarlet macaw REAL · EXTINCTLost, but not forgotten. — this collection
ANthe arcanum LEGEND · YET REALbelieved fiction, proven fact — coelacanth, okapi MYTH · NEVER REALthe Forbidden — kraken, unicorn

Collection I — edition of 50 per record

Eight records, stitched in red.

Movement I

By our hand

Dodo cap, front Cap strap embroidered IN 1.90.01 in red thread
IN 1.90.01
Dodo
Raphus cucullatus
Lost c. 1662 · hunted; rats and pigs took the nests

Named by sailors, gone within a lifetime of being named.

Great auk cap, front Cap strap embroidered IN 1.90.02 in red thread
IN 1.90.02
Great Auk
Pinguinus impennis
Lost 1844 · hunted for down, eggs, and specimens

The last two were killed on Eldey, 3 June 1844; their single egg crushed underfoot.

Passenger pigeon cap, front Cap strap embroidered IN 1.90.03 in red thread
IN 1.90.03
Passenger Pigeon
Ectopistes migratorius
Lost 1914 · billions, hunted to none

Once darkened the sky. Martha, the last, died alone in Cincinnati.

Ivory-billed woodpecker cap, front Cap strap embroidered IN 1.90.04 in red thread
IN 1.90.04
Ivory-billed Woodpecker
Campephilus principalis
Lost c. 1944 · the old-growth forest, felled

The Lord God Bird. Searched for, hoped for, never confirmed again.

Moa cap, front Cap strap embroidered IN 1.90.05 in red thread
IN 1.90.05
Moa
Dinornithidae
Lost c. 1440 · hunted after human arrival

Nine species of giant, gone within two centuries of first footfall.

Thylacine cap, front Cap strap embroidered IN 2.90.02 in red thread
IN 2.90.02
Thylacine
Thylacinus cynocephalus
Lost 1936 · bounty-hunted to extinction

Benjamin, the last, died at Hobart Zoo — weeks after protection finally came.

Movement II

Deep time

Woolly mammoth cap, front Cap strap embroidered IN 2.90.01 in red thread
IN 2.90.01
Woolly Mammoth
Mammuthus primigenius
Lost c. 2000 BCE · warming climate, hunting

Still walked Wrangel Island while the pyramids rose.

Dire wolf cap, front Cap strap embroidered IN 2.90.03 in red thread
IN 2.90.03
Dire Wolf
Aenocyon dirus
Lost c. 11,000 BCE · the Ice-Age prey collapsed

The prey went; then the wolf.

Turn a specimen over — every record shows its code · red thread = gone

One record, three parts

The object.

FRONT

The specimen

The animal alone — no text, no border — small on the left panel, head turned in. Thread-painted at 58 mm.

Thylacine emblem detail
STRAP

The call number

The record's code embroidered on the strap, license-plate small. Red thread: this one is gone.

Red call number IN 1.90.03 on the strap
CARD

The accession card

A typed record in the box: the facts, the year, the cause — and a sealed cipher that decodes to the name of the last one.

IN 1.90.03
LOST, BUT NOT FORGOTTEN.
Passenger Pigeon
Ectopistes migratorius
✝ LOST · 1914 · hunted to extinction

Once darkened the sky in flocks of billions. The last, "Martha," died alone at the Cincinnati Zoo, 1 September 1914.

ACCESSION № __ / 50
The second line

The young we lost.

The same eight records, rendered as their young — the chick, the calf, the pup that its species never got to keep raising. Same call number. Same red thread. The youth lives in the emblem, never in the code.

And it is a different hat: where the adult sits small and turned inward, the young fills the cap and faces the other way. Youth-sized for children; also sewn on an adult cap, for anyone who wants the bold one.

Black cap with a large dodo chick emblem
IN 1.90.01 · dodo · chick
Black cap with a large great auk chick emblem
IN 1.90.02 · great auk · chick
Black cap with a large passenger pigeon squab emblem
IN 1.90.03 · passenger pigeon · squab
Black cap with a large ivory-billed woodpecker nestling emblem
IN 1.90.04 · ivory-billed · nestling
Black cap with a large moa chick emblem
IN 1.90.05 · moa · chick
Black cap with a large mammoth calf emblem
IN 2.90.01 · mammoth · calf
Black cap with a large thylacine joey emblem
IN 2.90.02 · thylacine · joey
Black cap with a large dire wolf pup emblem
IN 2.90.03 · dire wolf · pup
Two hats, one record

The pair — filed together.

Adult dodo cap
the adult · № 07/50
Dodo chick cap
the young · № 07/50

The adult and its young, under one call number — matched accession numbers, one box, both cards. The one that was last, and the child it never got to raise.

Matched numbers exist only in the pair.

THE PAIR · $118adult $68 · young $58, sold apart
First accession — autumn 2026

Join the register.

Edition · 50 adult + 50 young per record, numbered
Cap · structured six-panel, black twill · youth & adult
Adult · thread-painted emblem, left panel · $68
Young · large emblem, centred · $58
The pair · matched numbers, one box · $118
Code · embroidered on the strap, red thread
Share · 5% of every release supports conservation

The register opens each accession to its members first, a day before the public. No noise — one letter when a collection opens, one when it closes.

Images on this page are studies; each record is photographed from its stitched proof before the accession opens.