@mrtnlowr yes, as the two responses have already indicated, there are a number of manual URL search parameters available that have not (yet) been incorporated into the standard Filters interfaces.
To see more of these, check this thread:
https://forum.inaturalist.org/t/how-to-use-inaturalists-search-urls-wiki/63
To make suggestions for search options you would like to see available in the standard filters:
https://forum.inaturalist.org/t/ideas-for-a-revamped-explore-observations-search-page/8439