Hi Nat, awesome article. It has inspired me! On a similar vein of interest, my colleague Rich has just released this lovely bit of work aimed at naturalists. It’s a PWA with offline capabilities for helping with species ID (and also a toolkit for building custom ID sites/apps). All completely open source, too. Might be something you or your naturalist friends find interesting and useful.

https://www.fscbiodiversity.uk/identikit-mobile