Fungi: PLEASE for mushrooms please show photos of the underside! It is vital! Sometime an observation can’t even be ID’ed to family level because it is just a photo of an inconspicuous cap. And also spore prints can be crucial for differentiating between species and genera, and lastly if possible microscopy photos of the spores would be great but not very convenient for the average naturalist. Also take note of the nearby plants, especially trees. Also many other factors you can check for, such as how much does the cap skin peel back, taste (it is safe to chew/taste mushrooms, even toxic ones if you don’t swallow but some people don’t find this appealing. Take note if it was spicy or not), smell (most don’t have a distinct smell besides “earthy” but some do and it can help a lot, and also checking if it bruises (break a piece of the cap or damage another part of the fungus and see if it changes color after a few minutes or secretes latex).
Mosses: Sadly many genera won’t be ID’able to species without microscopy photos too, though if you just have nice clear photos and a habitat description it can usually be ID’ed to genus level.
Goldenrods: Potentially one of the most painful genera to identify in the United States/Canada. Good photos of the leaves, underside of the leaves, stem, flowers, and far away shot of the entire plant are your best bet for ID. Take note if any parts are “fuzzy”/pubescent, especially on parts of the leaves or stem.
Bees/Wasps: Nice photos of the abdomen are crucial often, side view is much less valuable compared to aerial view but having both is best. Also habitat description and host plant can help.
Salamanders: It is a case by case basis but at least in North America an aerial view, side view, and ventral view will all ensure you can have a confident identification, though if you are in a pinch you can usually get away with just an aerial view. (Also noting habitat, such as under a log or in a stream can help tricky situations).
Turtles & Tortoises: Clear photos of the scutes and how they are arranged, if there is debris/dirt covering them try to wipe it off gently. Also photos of the head (side profile), ventral photos, habitat description, and behavioral notes.
Frogs: If possible try to get ventral photos and make note if it was calling and try to described the call. Also nice photos of the legs and head are good.
Snakes: Head photos from the side and top view can be EXTREMELY useful almost everywhere, especially differentiating confusing species. And ventral photos can help but not recommended because if you don’t know if it’s venomous or not you shouldn’t pick it up. Also for certain lizards (especially North American Skinks) side view of the head and photos of the belly can help a lot.
Fish: More often than not top down photos aren’t going to cut it, best to have a photo of it out of the water in your hand or in a specimen container with side profile photos. And nice photos of the fin rays can be very useful as well as habitat.
Hope this helps some people :)