"Klara" wrote
Janet Bennett
Meant to say which way should the opening face? North, South, East or
West.
Could I fix a box to the fence post????

Not south or west or the fledglings will cook - if the eggs haven't
already. Not sure a fence is the best place, as fence tops tend to be cat
promenades... on a wall or tree might be safer.

Don't face it into the full sun, ours face E. but are also shaded by next
doors house so only get sun for about an hour mid morning.
I put two up on the side of our house for Sparrows, got Blue Tits instead
every year and I think they are now feeding their second brood if they do
such things. No way anything can get to them there and better than when I
had them on the fence, found a cat sitting on the box once.

--
Regards
Bob
In Runnymede, 17 miles West of London