Usually by the time the Victoria Day long weekend arrives the first odes have emerged – in the past I’ve seen baskettails in large numbers at Mud Lake and whitefaces and emeralds in Stony Swamp. This year has been different. A persistent wind from the north has prevented the daytime temperatures from rising much above 20°C; nighttime temperatures are still in the single digits. As dragonfly emergence depends largely on water temperature, it isn’t surprising that I had only seen one dragonfly before the May long weekend, a Common Green Darner at Parliament Hill on May 6th. This is usually one of the first species I see, as they migrate north from the warm south where they emerge. Temperatures had risen from 10°C on May 3rd to 20°C on the 6th, although the morning had started out as a chilly 5°C – perhaps an influx of warm air brought this gorgeous dragonfly up from somewhere where the north wind and flooding weren’t wreaking havoc on the wildlife.
Continue reading →