Eurasian blue tit

For a few weeks now sparrows and tits that were visiting the feeder on my terrace are not showing up. I have no idea why and where they are gone.
In the meantime the warm weather caused all the bird in the forest to come out and play.
Eurasian blue tit (Cyanistes caeruleus).
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December 2019 @ Puszcza Niepołomicka, Małopolska, Poland
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© 2019 Marcin Świostek