Icy

One icy morning I looked out my window 

& saw the most beautiful crow flying in the snow 

I watched it land in a very icy tree.

Dust of Snow, by Robert Frost

The way a crow
Shook down on me
The dust of snow
From a hemlock tree

Has given my heart
A change of mood
And saved some part
Of a day I had rued.

(Rue means 'sorrow or regret' so "Of a day I had rued" means a day I regretted having.)