Black stork      Must-toonekurg       Ciconia nigra 

When female Kati returned to the nest after forty minutes after her night-time egg-laying, Karl who had been keeping the eggs warm was already covered by snow.

It seems as if the arrival of spring has stopped.

*Lark winter, "lõotalv:  when snow falls after the first migrant birds, often larks,  have arrived, and winter seems to return. Old-time explanations involved grey and white “larks” at the same time; the latter were often snow buntings