Butterflywatch: the white-letter hairstreak’s fortunes are tied to our elms

In our writer's garden, and across the country, the scourge of Dutch elm disease has not been entirely eliminated

Look up. If you do, you'll almost certainly see butterflies where you've never noticed them before.

The hairstreaks are hugely overlooked mostly treetop-dwelling butterflies. Two species are active now: the white-letter hairstreak and the purple hairstreak.