Yes, a lot. Even if you're a die hard animal rights activist, can't you see that 3.2 million deaths from a population of a hundred million (say) is a much smaller deal than 3.2 million from a population of ten million? One means possible extinction of a species, the other does not.
If you are not an animal rights activist, it may be hard to see why preserving a species matters at all.
It seem to be of no importance. And as long as humans are concerned, it may even be the reverse, heuristically. The bigger species is (measured by total weight, for example), the more important it may be for sustaining the ecosystem.