In a report issued by the RSPB reported on the BBC site today, the plummeting numbers of House Sparrows has been confirmed.
To help them, it suggests that gardeners can help by "being lazy, doing nothing and allowing the garden to be a little bit scruffy". Hey, I'm doing my best.
It may be, of course, that they have emigrated to Canada and the USA.
On the RSPB site itself, there is a hint that mixing nuts with chilli powder keeps squirrels away.
This might have this effect.