English White
A variant of Coturnix quail (Coturnix japonica)

Representative Coturnix quailphoto — a dedicated image of this exact morph isn't available yet.
A white-plumaged Coturnix line (often with a few dark head flecks), popular for clean, easy-to-pluck carcasses. A recessive/selected white plumage form.
Keeper tips for this variant
Whites can't be feather-sexed, so rely on vent foam or crowing to identify males; also offer some shade since the pale birds show stress and pecking damage readily.