If you’re photographing a caterpillar, Kate recommends getting at least three photos: one the top of the caterpillar, one of the side showing all the sets of legs, and a photo of the face (aka head capsule). It’s also really important to note the host plant (or make an observation of the host plant and get it identified on iNat). Even then, she reminds us that not all caterpillars (or adults) can be identified to the species level from photos alone.