In message , ned writes
I have periods when the local sparrowhawks patrol the area and that
certainly causes the locals to take off for safer pastures for a while.
--
ned

We have a 20-cm seed feeder in which we have sunflower hearts. This time
last year daily consumption was two full feeders a day - 40 cm of seeds.
In the summer the sparrowhawk turned up, and now daily consumption is
generally no more than 2-3 cm a day!

--
Klara, Gatwick basin