As to birds, the duck lays the mundane egg. "Then the water-mother finds a place upon her own knees for the duck to rest, where it lays an egg which rolls into the sea. There it breaks and is transformed into the earth."
From one half the egg, the lower,
Grows the nether vault of Terra;
From the upper half remaining
Grows the upper vault of heaven;
From the white part come the moonbeams,
From the yellow part the sunshine.
* * * * *
Wainamoinen, wise and ancient,
Made himself an ax for chopping,