Is there a way to copy the criteria of an existing Project?

unless new functionality is added to the system, i think you’d have to do this via the API.

you can get a list of taxa from the existing project from: https://api.inaturalist.org/v1/projects?id=140929.

then to add those taxa to your own project, you can do some variant of the third type of API request described in this post: https://forum.inaturalist.org/t/edit-project-breaks-entirely-for-project-with-undefined-user/30070/13.

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