This originally came in as a feature request but I popped it over in General instead because you should be able to do these searches with some existing tools:
- Identify grasshoppers and scorpions: https://www.inaturalist.org/observations/identify?taxon_id=48894,47651
- Identify gastropods, but not nudibranchs: https://www.inaturalist.org/observations/identify?taxon_id=47114&without_taxon_id=47113
You can read more about some modifications to search URLs that aren’t in the website’s user interface filters here: https://forum.inaturalist.org/t/how-to-use-inaturalists-search-urls-wiki/63