[yaky]

Yes, it's very apparent that it was trained on specific images, e.g. pointing camera at a window insect screen will assume "insect", and a pile of dry leaves is either "mammals" or "tinamous". My orange cat who lays with front paws crossed is a domestic dog (because dogs lay like that). But an aphid colony and specific lichens are identified almost immediately.

In my experience, it's best for small static things, like fungi, lichens, some plants and insects.

Merlin sound ID, too, can produce false identifications (e.g: my relative fooling around was a marsh wren), and I've seen birders frown upon "Identified by Merlin" rare birds posted to eBird.