This is true, but irrelevant here. The bird is moving much less mass, so it takes less energy per mile traveled. I was trying to point out that if you normalize

This is true, but irrelevant here. The bird is moving much less mass, so it takes less energy per mile traveled. I was trying to point out that if you normalize the energy consumption of a Tesla by the mass it is moving, you get a much more favorable (and sensible) comparison.