Introvertebrates Codex · Beta testers wanted
A field log for the animals in your care. Android & iOS keepers welcome.
Help me shape the app

Animals worth a closer look

Most people have never really looked at a spider.

Introvertebrates is about the animals that get flinched at, misread, and underestimated — explored through video, writing, and tools for people who find them genuinely fascinating.

  • Current collection tracked in Codex
  • Photographed in my own collection

Latest from Introvertebrates

New reasons to look closer.

Fresh research, Sunday animal stories, new videos, and meaningful additions to the living collection.

See all updates

The living collection

Meet the collection.

Tarantulas and other spiders, an assassin bug, sun beetles, and Sonja, a Reeves’s turtle. The full collection now has its own room to breathe.

All current residents

Close portrait of Elvira, a Chilobrachys natanicharum tarantula

Research journal

What science is revealing.

New papers, unusual behaviour, evolution, and discoveries from across the invertebrate world — collected in a growing research journal.

Close frontal portrait of Siuzi, a Theraphosa apophysis tarantula

Introvertebrates on YouTube

Stories in motion.

Close observations, animal behaviour, care, and the details that are easy to miss when we only glance.

Sabrina, a Brachypelma hamorii tarantula

Conservation

The species beyond the enclosure.

What do Ruby’s and Sabrina’s wild relatives face? Explore documented conservation assessments, their dates and the difference between national and global status.

From the living Codex

The collection, measured over time.

Public-safe totals and standout measurements from the same field log used to follow feeding, moults, growth, and time in care. Missing measurements stay missing rather than becoming estimates.

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Beta tester recruitment

Introvertebrates Codex

Help me build a better field log.

I’m building Introvertebrates Codex, a mobile app for keeping track of the animals in your care: feeding, moults, growth, and observations, all in one personal field log.

I’m looking for beta testers who can try it with their own collection, spot bugs, and tell me what makes everyday record-keeping easier. It’s still in development, and your feedback will help me shape what comes next.

Android

Use an Android phone? Get in touch to take part in beta testing.

iPhone / iOS

Keep on an iPhone? I’d love to hear from you too. Message me about iOS testing.

Tell me whether you use Android or iOS and a little about the animals you keep. Contact me privately by Instagram DM or email; there’s no need to share your details in public comments. — Erlend

A 30-second look at Codex, the personal field log I’m building for invertebrate keepers. Android and iPhone beta testers welcome.

Community field log

Measured by keepers. Reviewed before publication.

A moderated home for remarkable measurements, keeper photography, and individual animal stories. Every published claim shows the evidence level behind it.

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Explore records or submit an animal

Your own Codex data stays private unless you deliberately prepare and share a public-safe submission.

Erlend smiling while seated in the doorway of his van
Erlend · creator of Introvertebrates · Norway, 2026

Behind Introvertebrates

Curiosity before fear.

I’m Erlend, the keeper, photographer, writer, and builder behind Introvertebrates. The project grew from a lifelong interest in animals and a desire to replace reflexive fear with closer observation.

Here I bring together my current collection, original photography and video, research notes, and digital tools — all built around the same idea: misunderstood animals become far more remarkable when we take the time to look.

How the site is made: The animals, photographs, video, keeper observations, and final editorial decisions are mine. AI assists with drafting, organisation, image-processing workflows, and technical development; scientific claims are checked against named sources before publication.