On the checklist page for your place:
https://www.inaturalist.org/check_lists/2016024-Interreg-IT-FR-Marittimo-Check-List
Next to the Add to List link, you will see a smaller link, Add Batch. One option for this is:
Upload CSV
File should be in the following format: taxon name, description, occurrence status, establishment means. CSV should not contain a header row.
Allowed occurrence status values: present, common, uncommon, irregular, doubtful, absent
Allowed establish means values: native, endemic, introduced
Things I don’t know, having not yet used this feature:
- Does an uploaded CSV replace the entire existing checklist, or just add to it? (hopefully the latter)
- Will taxa that already exist in the checklist have their description, establishment means, and/or occurrence status values updated if included in the CSV?
EDIT: see subsequent post here. Uploading a CSV allows both addition of new taxa, and updates to existing taxa.
Something that is likely true:
- If the taxon name does not exactly match an iNat taxon name (or synonym name used only once?), it will probably fail to import, and you will need to add such taxa manually. Or maybe the upload process will query you to correct mismatches – will just have to try it and see.
EDIT: mismatches are flagged, with the opportunity to look up and save an iNaturalist equivalent for each one.