Corvids

This morning I awoke clear-headed, alert and full of energy.
By early afternoon my hours of staring at a screen had made me heavy & torpid so I grabbed the chance to cycle around the Downs for half an hour or low bright sunlight.

There were so many corvids around, pecking at the turf or scavenging discarded food wrappers.
I saw crows, rooks, a couple of jackdaws, plenty of magpies and a solitary jay. Why so many? What's so special about the Downs?

:o)