You can filter now by clicking on “Show only missing species”
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Amazing, thanks so much!
this is a nice, simple presentation of information that folks often ask for (ex. https://forum.inaturalist.org/t/how-can-see-species-i-havent-observed-in-a-specific-region/61466, https://forum.inaturalist.org/t/how-to-i-search-for-species-i-havent-observed/41601). i think the only thing i think might make it even more useful is to add autocomplete / search for the place input, maybe the ability to do something similar to taxon (although what you have there isn’t terrible), and maybe one for user, too.
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Maybe this is a stupid question but how do I get the place id # for my area?
I don’t know if there is a better way, but what I do is open an observation in the area I’m interested in, then click on “Details” under the photo. Then if you hover a mouse over any of the Places that the observation is included in, the place number will be visible in the the URL for that place that will show at the bottom left of the browser page. No idea how to do it if you are only using the app, sorry.
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you’re an app user, and i’m not sure if there’s a straightforward way to do that in the app. but you can go to the website, and there are various ways to get this. for example, in the search thing in the top, you can search for your place, and the select view observations (possibly in a new tab, to prevent the app from opening up the results). from there, look in the URL for the value associated with place_id.
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Thanks I was able to figure it out by using the website version in the browser
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Completely broken for me.
Doesn’t return any results from the project number I entered, instead defaults to species from the central East US coast… based on species seems to be the Virginia area.
the page accepts a place id, not a project id
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Ah, well that both explains it and limits its usefulness.
Nice. Although it says I did not observe Achillea millefolium in Prague. I wonder whether it really grows there that much. Most of those observed there may actually be A. collina (which has only recently been promoted on POWO from a subspecies to a species and cannot easily be distinguished) so my obs are “Achillea millefolium complex”.
Hi Glauber,
Thanks a lot for sharing this tool, it’s really great and super helpful to quickly visualize what’s missing in a given area!
I had a small suggestion: would it be possible to separate Stylommatophora (terrestrial mollusks) from other mollusks? As someone focused on land snails, it’s a bit tricky to use the tool to track what I’m missing, since aquatic and marine mollusks are mixed in. It’s quite rare for a malacologist to go both snorkeling and flipping logs in the forest on the same day
Anyway, congrats on the tool, it’s a fantastic resource!
Louis
It looks like I won inaturalist (at least for my home region) 
And I missed 17 species for home country.
PS: It is possible to use “any” as place id to get worldwide stats. In this area I have only 202 species of 500, so I have some more things to do)
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Neat idea! Says I observed 28/100, though I checked, and it actually should be 31. I’ll have to try and search for the remaining 69 species…
Awesome, this should be a standard feature of the site
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It certainly counts cultivated plants towards the ranking. When I go through the missing top 500 plants, many of those are almost only found cultivated.
It keeps saying that it’s am error. The place ID is correct? (I said Europe) What should I put as place ID for it to work?
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This is great! Fun and useful - it never occurred to me how many common things in my area I’m missing. I could go out today and get a couple dozen more species. Like poison ivy. I think I’ll just submit a picture of my hands and arms right now. Should be sufficient evidence of presence. 
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Playing around with smaller locations, I’ve noticed it’s missing my records of obscured species. I guess that’s by design and an indication that obscuring locations is working as intended. Just something to keep in mind. That might explain why this tool sometimes gives a smaller number than using iNat to search for your species in a particular location while logged in.
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It doesn’t seem to work at all for me. When I type in my username it only brings up observations from someone else from Japan.