I've read that to get an idea of how a person with face blindness see it's like if someone at the zoo gave you a picture of a pigeon or dolphin and then you would have to guess which animal was the one in the photo in their habitats.

The thing is that, unless you examine these animals thoroughly they have really similar faces (if not identical) to the human eye and the differences between members of the same species are usually very small. However in humans the differences can be more obvious (people with different eye and skin color, very separated eyes, big mouths, small noses...etc)

Do people with prosopagnosia can distinguish these differences (contrary to how we would generally do with animals) but are unable to store them in their memory so if they see the same person again it's like if they met again for the 1st time?