Nature Notes columnist Jono Forgham covers your fortnightly look at nature around Bishop’s Stortford At last, sunshine, good temperature and my first Nature Notes wander of the year in T-shirt and shorts. I had planned on visiting a local garden, but this was not convenient so I left the car in the car park in Pig Lane and took a wonderful wander south along the Stort Navigation towpath as far as the marina at Gaston Green. Plans were to see what dragonflies and damselflies were on the wing. Seeing as I was going to cover the same ground twice, I opted for my long lens for the walk out and the…