Two subspecies, two portraits
Congo and Timneh are distinct subspecies that we distinguish from your photo. The Congo is larger with lighter silver-gray plumage and a vivid red tail. The Timneh is smaller, darker, with a maroon tail and a horn-colored upper beak. Neither is normalized to the other — your specific bird's subspecies carries through every portrait style.
The scalloped plumage
Every feather on an African Grey has a paler edge, creating a scaled-armor effect across the body. We hold the scallop pattern rather than smoothing it into solid gray. In Watercolor the edges soften without disappearing; in Library the pattern reads as fine textile; in Tudor it reads as chainmail. Lose the scallops and the bird could be any gray parrot.
Library is the natural fit
African Greys read as the philosopher of the parrot world, and Library — books, lamp, quiet wood — is the palette the bird's bearing was made for. Tudor suits the gravity. Edo woodblock flatters the scalloped plumage as a print pattern. Watercolor softens without losing the eye. The bird carries larger formats well; the bearing fills the frame.