Mammals sure, but we're actually not sure whether animals that lack a prefrontal cortex and other brain structures associated with conciousness actual are concious. So I'd definitely buy dog and bat, the fly I'm pretty skeptical of.

The fact is that conciousness seems to be a later evolved trait, with most things associated with conciousness being in the prefrontal cortex. And there's some argument that only animals that have this brain structure have conciousness. mechanisms to perform environment simulation, allowing us to try to predict the behaviour of our surroundings and other animals and people. There's a lot of what we do that doesn't require or even use conciousness. You are not aware, for instance, of all the image processing that gets done to give you vision; you're only aware of the final image.