"dylan" wrote in message
...
snip
Water put out this morning, although it was -6deg C out there so not sure
how long it was water.

Know what you mean. Our bird bath supplemented by a disused wok gets frozen
solid and has to be emptied out and refilled daily. Actually more like
broken out than emptied.
It always amazes me just how hardy our garden birds are.

btw Yellowhammers were quite common in my part of Scotland in the '50s.
Never kept in aviaries to the best of my knowledge.
Jim