In eBird I can sort my observed species by which are the newest species I’ve observed that I have never logged previously in eBird. I see this being useful for parsing my person Life List generally and within each Class on the life list. As well it would be nice to have this as a filter option on the Your Observations page. Similarly it would be nice if there was a way to filter results on the Explore page to exclude or include species you’ve already observed.
I know how to answer part of this question… to made a “needs” list and see species you have yet to observe just add “&unobserved_by_user_id=edropkin” to the end of the URL. I wish this was a quicker way to do this, I find myself constantly needing to look up that command.
Put your username in there, the date and there you go. Love this tool since I found out about it within last couple of weeks. https://kildor.name/inat/new-species
You can use this tool to see your lifelist, newest species on top https://glauberramos.github.io/inat/lifelist
That’s a fantastic tool! And you can sort for Endemics, which someone was asking about in another thread.
The calendar feature already partially covers this use case. If you go to the page related to any single day, it tells you which taxa you have discovered on that day (inaturalist.org/calendar/username/yyyy/mm/dd) For instance, if I go to
https://www.inaturalist.org/calendar/valentinkempf/2026/9/16
I can see that on the 16th of september 2026 I have made my first observation of wild boar as well as all the other taxa I have first observed on that day. It may be a bit more clunky, because you can only see them for one day at a time, but depending on how many new taxa you find in one day, it might not be much of an issue.