# A way to search needed/missing species? **URL:** \ **Category:** General\ **Created:** [September 3, 2020, 7:55pm UTC](https://forum.inaturalist.org/t/a-way-to-search-needed-missing-species/15979 "2020-09-03T19:55:01Z")\ **Posts on this page:** 1\ **Showing post:** 3
**Author:** ![thomaseverest](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.inaturalist.org/thomaseverest/32/63220_2.png) [@thomaseverest](https://forum.inaturalist.org/u/thomaseverest)\ **Post date:** [September 3, 2020, 8:46pm UTC](https://forum.inaturalist.org/t/a-way-to-search-needed-missing-species/15979/3 "2020-09-03T20:46:07Z")
You can add `unobserved_by_user_ID=` to a url, but you have to add it in manually. For example, this is birds you haven’t seen in San Diego: [https://www.inaturalist.org/observations?place\_id=829&subview=grid&taxon\_id=3&unobserved\_by\_user\_id=mikethebirder&view=species](https://www.inaturalist.org/observations?place_id=829&subview=grid&taxon_id=3&unobserved_by_user_id=mikethebirder&view=species) You can also use `list_ID` to search for things in lists (such as life lists). So to find birds you’ve seen that finatic hasn’t, you’d want to add your life list and `unobserved_by_user_ID=finatic`. (Hm I tried [this](https://www.inaturalist.org/observations?list_id=986830&place_id=any&subview=grid&unobserved_by_user_id=finatic&view=species) and it didn’t seem to work. There’s probably something I’m doing wrong.) Lists can sometimes get a bit wonky though so that might not always work. See [this page on urls](https://forum.inaturalist.org/t/how-to-use-inaturalists-search-urls-wiki/63). And this has come up before ([here](https://forum.inaturalist.org/t/show-me-what-i-havent-seen-yet/2267/11) and [here](https://forum.inaturalist.org/t/list-species-i-havent-seen-in-a-particular-place/3642)). --- _[View the full topic](https://forum.inaturalist.org/t/a-way-to-search-needed-missing-species/15979)._