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What does the term 'category of ID' photos mean?
There is, and cannot be, an all-embracing definition. Certainly, the the images, recently posted, of a butterfly collection would qualify, at least for individual shots. The term 'record shot' comes to mind'. While for some purposes, both are valid types of image, the terms are often used in a derogatory context by those looking for something more 'creative', whatever that means.
There is a tension, too, in the world of macro photography, between those who work entirely in a 'studio', usually with non-living subjects, where they have control over just about all relevant factors, and can take their time, re-shoot, etc, use deep stacks, and so on, and those of us who shoot almost entirely out of doors, often with very active and unpredictable subjects, weather, etc.