Great tits, blue tits in the snow

This 12 December 2017 video shows great tits and blue tits feeding in the snow.

Simone Kuijt made this video behind the window of her home in the Netherlands.

Blue tit eggs that were laid in urban parkland were 5% larger than eggs laid in a nearby forest, which could be due to differences in the amount of calcium available to birds in urban and forest environments, a study finds: here.

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