Natural History, Nature Reserves Willow Emerald Damselfly Eggs in Willow Twig 8 November 2018 Ian Alexander Willow Emerald Damselfly Eggs in Willow Twig. The female cuts a slit in the bark for each egg. The cuts have healed up (by now, November) leaving a bump around each egg. Willow Emerald Damselfly (photographed earlier this year). The species is very new to Britain, having arrived last year or not long before that; and this year is the first time we’ve seen them at Gunnersbury Triangle, so it’s very exciting to see the unique egg-laying traces! Netty with glorious autumnal Aspen twig. The colours are exactly as photographed.