Different location - use DQA - Location is not accurate - which makes it casual.
For an actual duplicate - the same photo - I use (this is not in the guidelines)
See also (insert link to other obs)
please delete one of them
Please don’t ID duplicates - they need to be deleted by the observer
See Observation Field - Duplicates Observation
(We need a new DQA - duplicate - same info all the way = Casual)
For this is the same bird, but from a different angle and shows more field marks - I use this, which IS within iNat guidelines
See also (again insert link/s)
Please combine multiple pictures of the same individual of a species
https://forum.inaturalist.org/t/how-to-turn-multiple-observations-into-a-single-observation/9838
(We need a new DQA - combine multiples to one obs - also to be pushed to Casual)