Birch sawfly

 At first glance I thought this was a bee, resting on a gorse flower - then I noticed those club-tipped antennae, the un-beelike way it held its wings and its lethargic behaviour. It's a dark birch sawfly Trichiosoma lucorum, one of the club-horned sawflies. Its larvae feed on birch leaves.

I found it in this gorse thicket, with birches nearby, on the north bank of the river Derwent at Blanchland in Northumberland.