Sparrows do this - presumably they like the taste. They eat yellow crocuses as well.

Thanks

Could be eating bugs, there are a lot of greenfly about at the moment?

Thanks

Found the following in a report in the independent:

"........The report shows that sparrows in the city centre are heavily dependent on one particular type of insect - aphids, the greenfly hated by gardeners - for feeding their young.

Nestlings that do not get enough aphids simply starve, and this may be happening regularly with the first of the three annual broods sparrows need to produce to maintain population levels."

That makes a lot of sense thanks