Blue Tit
A frequent visitor to our garden.
Once upon a time they managed to get through winter by drinking milk.
Somehow they got to know that they could peck through the foil lid on doorstep pints and help themselves.
Nowadays they’re reduced to gorging on nut feeders and fat balls!
Snowgood's Blog 
Good one! Yep I remember seeing them pecking thought the milk bottle foil, especially remember when those were frozen and lids were an inch above the top of the bottles (minus bird pecking as I suppose they’d migrated?!)
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