Yale
A yale showing its moveable horns; one is held forward for fighting, the other held back as a reserve in case the first one breaks. It has the jaws of a boar, complete with tusks.
The image was obtained from the source listed below.
Museum Meermanno - MMW, 10 B 25 - Facsimile
Manuscript
Museum Meermanno, MMW, 10 B 25, folio 14r
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Possible copyright holder: Museum Meermanno
Medieval Bestiary site copyright information
Museum Meermanno - MMW, 10 B 25 - Facsimile