Installation by one of my favorite critters. Variously called balloon spiders or parachute spiders [generation dependent?] – they are tiny – and they spin out a long filament of their web into the wind till the lift is greater than their miniscule weight. Take off and fly like a balloonist until they reach a useful obstacle which they homestead.
Checked back through the blog and they’re 3 days earlier than last year. Pretty much always a June discovery and a solid sign of summer for me.