How to find which species found in one place are not found within another place?

General
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6

@mws if you’re referring to species that have been observed on iNaturalist (and not all species ever found in a place), you have to break it into taxonomic chunks that have fewer than 500 descendants, but the Compare tool is otherwise great for this.

Here’s a link that compares bees that have been found in Ontario, but not in Guelph:

https://www.inaturalist.org/observations/compare?s=eyJxdWVyaWVzIjpbeyJuYW1lIjoiT250YXJpbyIsInBhcmFtcyI6InRheG9uX2lkPTYzMDk1NSZwbGFjZV9pZD02ODgzIn0seyJuYW1lIjoiR3VlbHBoIiwicGFyYW1zIjoidGF4b25faWQ9NjMwOTU1JnBsYWNlX2lkPTE0MDUwOSJ9XSwidGFiIjoic3BlY2llcyIsInRheG9uRmlsdGVyIjoibm90X2luX2NvbW1vbiIsInRheG9uRnJlcXVlbmNpZXNTb3J0SW5kZXgiOjEsInRheG9uRnJlcXVlbmNpZXNTb3J0T3JkZXIiOiJkZXNjIiwibWFwTGF5b3V0IjoiY29tYmluZWQiLCJoaXN0b3J5TGF5b3V0IjoiY29tYmluZWQiLCJoaXN0b3J5SW50ZXJ2YWwiOiJ3ZWVrIn0%3D