We know that blue tits (along with great tits and coal tits) do feed on horse-chest leaf-miners. They peel open the leaf mine to extract the pupa inside.
|You might have noticed blue tits feeding in the canopy of horse-chestnut trees, but bird-attacked leaf-mines are easy to spot and count. (Photo by Richard Broughton)|
And, does that activity occur everywhere? Or is it a behaviour that is spreading across the country (such as when blue tits learned to attack milk bottle tops to get the cream)?
|The evidence of bird attacks. Look for these and count them to take part in the bird attacks mission of Conker Tree Science (you don't have to wait to watch the birds themselves).|