Easy way to mark multiple-species observations

It’d be pretty hard to hard-enforce for many cases (I have had cases where I honestly don’t even know if the several photos of the same species of bird from the same tree are the same individual or another one from the group, etc), although I’d imagine if the observation is also not from the same approximate location, just the same field trip, then we would actually want to start enforcing it or the location becomes kinda meaningless? (plus, it’s IMO very interesting data to have 10 obs of the same species rather than one, it shows how common it is…)