The flowers have all finished now and we're just waiting for the plants to die back before going hunting for tubers. But then on Sunday afternoon I noticed some goldfinches eating seeds (presumably) out of the flower heads. Martin and I were transfixed, often laughing, seeing one clinging upside down on a wildly swinging stem pecking up at a flower head, then another perched precariously on a head itself, picking between it's toes. Maybe next year we won't be dead-heading the plants as the flowers die?
(Apologies for the poor quality pics - we were inside, and I actually did most of my bird-watching with binoculars!)