True that The Soul Cake Duck is not part of the Dunmanifestin gang, but it/he/she is an ornithopomorphic manifestation with abundant devotees. Unlike The Hogfather, who will in time have his own pages here, this seems to best place for inclusion.

The Soul Cake Duck stamps were released in the Year of the Snivelling Panda in sheets 36 with one What Duck? sport per sheet, together with a Happy Soul Cake Day cover. In style, the stamps resemble the 1948 unissued and hand-drawn potato essay stamps of Tristan da Cunha.