GlobalLab
Приметы весны: поёт большая синица
Average long-term time frame of the first songs tits
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According to long-term studies in different regions of Russia can be found the following periods:
for St. Petersburg and the region - 19.02 (10.02 early start)
Tomsk region - after 10.02
Syktyvkar - 10.02
near Krasnoyarsk until 26.02
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