Well in the Finnish creation myths the world did come from an egg laid by a teal. Here is the relevant part:

Quick the maiden moves her shoulders,

Shakes her members in succession,

Shakes the nest from its foundation,

And the eggs fall into ocean,

Dash in pieces on the bottom

Of the deep and boundless waters.

In the sand they do not perish,

Not the pieces in the ocean;

But transformed, in wondrous beauty

All the fragments come together

Forming pieces two in number,

One the upper, one the lower,

Equal to the one, the other.

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,

From the motley part the starlight,

From the dark part grows the cloudage;

And the days speed onward swiftly,

Quickly do the years fly over,

From the shining of the new sun

From the lighting of the full moon.

Here is the full text of the first chapter.