This video from North Carolina in the USA says about itself:
6 September 2017
Chickadees – just Chickadees for a change. A rare chance to have food to themselves except for one brief visitor. In the Great Smoky Mountains Black-capped and Carolina Chickadees ranges overlap and it can be a challenge to tell them apart. What type of Chickadees do you think these are?
Dear Kitty. Some blog 
I could tell you what we call these birds in Britain but you probably wouldn’t believe me.
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They look like willow tits in Europe:
https://dearkitty1.wordpress.com/2015/04/05/golden-eagle-siberian-tit-bullfinch-in-finland/
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