A combination of an animal taxidermy head mannequin and mouth assembly includes a mouth shell, a mannequin head and a commercially available jaw set. The engaging section engages with the engaged section such that the engaged section is detachable by being displaced in a predetermined first direction. A trough is established in the inner rim between the flange section and rim flange. A first gap is provided between the first outer proximate portion and said another of the first and second lenses.