For the past couple of weeks, the fat-ball holders
at the back of the cottage have been emptying at an alarming rate...!

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He/she was there for about twenty minutes,
pecking at all the little birds (including the disgruntled great tit, below)
that also tried -- in vain -- to get a beakful (rotten so-and-so);
and he/she ate about half a fat-ball (greedy so-and-so) in that time!