According to the legend of the Irish Saint Bride (Saint Brigid) she was miraculously carried by angels to Bethlehem to attend the nativity of Christ. Scenes from the life of Christ decorate the angel's robes. They are led by seagulls and an otter. That Saint Bride lived 600 years after the birth of Christ did not bother the Celtic mind in the least. I really like this picture.
This painting was on the cover of the book on Celtic Spirituality by J. Philip Newell we used for our Journey in Faith study at Christ Church last spring.