MS M.81, fols. 49v–50r

Swan (left)
Swans, like the one here shown swimming confidently with a fish in its beak, were considered good omens by sailors because of their buoyancy.

Cranes (right)
This crane demonstrates its vigilance during the night watch by holding a red stone in its claw, which would startle the bird awake if it becomes sleepy and drops it.