Royal 10 E IV, f. 3, Mermaid and merman
Rabbit blowing a horn. Among the marginal creatures populating medieval manuscripts musical animals are fairly common.
This is beyond bizarre - from the Luttrell Psalter, anonymous medieval manuscript known for its scenes of daily life and otherworldly beings.
Prayer roll, MS G.39 fol. 11r - Images from Medieval and Renaissance Manuscripts - The Morgan Library & Museum
Calling All Manuscript Sleuths: The Macclesfield Alphabet Book - Medieval manuscripts blog
Cat with a zither, from a Belgian Book of Hours, c. 1470.
Detail from The Luttrell Psalter, British Library Add MS 42130 (medieval manuscript,1325-1340), f171v
Boethius, De Musica, c1350
Geoffrey Chaucer, The Canterbury Tales, 14th century ~ British Library #illumination
Detail from "The Rutland Psalter", medieval (c1260), British Library Add MS… More