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Home of identification and diagnostic keys

Creating and using identification and diagnostic keys has never been easier. The Lucid Builder, Player, Fact Sheet Fusion, and the Lucid Mobile platform provide all tools needed to produce world class keys.

Want to build keys?

Learn more about building your own keys.

Looking for a key?

Want to identify an insect, plant or animal? Find out what keys are available.

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If you have any questions or need support using our tools please contact us.


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Lucid Builder

Identification Matrix keys Multi-access keys

Easy, efficient, powerful key authoring 

Construct multimedia identification keys on any topic you choose quickly and easily. Works on Windows, OSX and Linux.

Lucid Builder main interface

The Lucid Player is used to play interactive identification or diagnostic keys or guides created using the Lucid Builder.

Lucid Builder

Spotlight Features

No limits

Add as many species and characters to your key as you want.


Lucid supports importing and exporting of key data in open formats. No data lock in here.

Reporting tools

Generate reports on the state of your key. Check if your keys features are enough for your end users to make an identification.

Easy scoring

Linking your features (questions/characters) to your species is just point and click. You can score three different ways.

Play as you go

With the built in Player you can 'play' your key anytime during its development.

Multiple operating system support

Run the Builder on Windows, OSX and Linux. The Player works without any installation and is also available on Android and Apple iOS via native apps.

Attach multimedia

Attach images and Html to your features and species. It also support attachments via Fact Sheet Fusion.

Create written descriptions

Make the most of your key data. The Lucid Builder can create natural language output from your key.

Fast deployment

The Lucid Builders built-in key deployment process makes getting your key to end users a fast and simple process.

Fact Sheet Fusion

Fact Sheet Fusion

Create fact sheets fast! 

Build fact sheets faster than you though possible! Combine with your Lucid key development or use separately Fact Sheet Fusion will greatly increase your productivity.


From our blog

Queensland Shark and Ray ID tool

This user-friendly identification tool has been developed to aid field identification of shark and ray species and families that may be encountered in Queensland’s inshore net fisheries. Correct species identification, although difficult, is crucial as it unpins accurate data collection for research, monitoring and evaluation of fishery stocks, and increases confidence in the assessments derived…

A Key to the genera of Australian Jumping Spiders (Araneae: Salticidae)

The key is intended to meet the needs of naturalists, biologists and taxonomists who wish to identify Australian jumping spiders. The character set has high redundancy (99 characters, 293 character states) allowing users to begin with whatever observable characters are available to them when using photographs, a high-powered hand lens or a microscope.

Spider mite species of Australia (including key exotic SE Asian pest species)

This interactive key provides diagnostics for all the species of spider mites (Acari: Tetranychidae) previously recorded in Australia, based mostly on literature records. Several species collected in Australia, but not yet recorded in the literature, are also included (manuscript in prep). In addition, a few select exotic species from south east Asia of concern to…

Lucid Mobile Platform

Case Studies

case studies

Animal and Plant Identification keys
Diagnosis of crop problems and plant selection

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