Where's it all going?

One of our weekend shopping treasures was this bird feeder (never had one until now in our garden), which we filled and hung on Monday. When we looked in the morning, quite a lot had disappeared, but we still hadn't seen more than one or two birds, very briefly, actually eating from it.

I think if I'm going to get any nice photos I'll need to be an "early bird" and get up with the sun one day...!