I suppose one positive thing about feeding our garden birds is that it has given me more chance to study them and their behaviour which has been fascinating on occasion as I learn more about them. I don't know where the term "bird-brain" came from as an insult to someone but I'd take it as a compliment when I see how clever birds really are - most of the time !
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Regards, Hazel
"Each kindness shown to birds or men is sure to flutter back again"