Smooth-breasted (frizzle)
A variant of Sebastopol Goose (Anser anser domesticus)

Representative Sebastopol Goosephoto — a dedicated image of this exact morph isn't available yet.
A Sebastopol type with long curled feathers on the back and sides but a smooth, normal-feathered breast and neck (vs. the fully curled 'frizzle' form). One of two recognized feather types.
Keeper tips for this variant
The smooth breast is slightly better at shedding water than the fully curled type, but still keep them out of prolonged rain and provide a bathing source for preening.