I withdraw my statement. I misunderstood.
The two woodpeckers are very similar. The white markings on the back of the ivory-billed are very distinctive and separate one from the other. Not all birds are sufficiently obliging to let the viewer see their backs (or in other birds, the distinctive breast, or eye-ring, etc.).
No problemo. I don’t have any cool woodpeckers here in NM, just ones that try to beat holes in my house. But I’ve got ravens easily 15 years old and a whole society built around them.