"martin" wrote
The sparrow population declined from lots to zero between one year and
the next here.

And in our little garden it went from zero for years (about 20) to a flock
of about 15 in the last year. Amazing recovery and we can't keep the seed
feeders full any more. :-)
Even more amazing was a Lesser Spotted Woodpecker on the birdtable in early
summer.

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