Bird watching

It has been extreme cold.
For trees spring has come a little early.
Sap of Birch and Maple started dripping.
It is made by decline of temperature in the day and night.
It is called “sap icicles”

“Poecile montanus (Conrad von Baldenstein, 1827” and many wild birds fly to sap icicles as if competing with one another.

As it is getting warm, we will see “Sciurus vulgaris orientis” linking sap.