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Saturday, 1 June 2019
A walk round the pond - Week 22
I went to the pond early yesterday morning. It was mild and calm but grey and drizzly. I was hoping I might find an emerging dragonfly and I soon found this. I had arrived a few minutes too late as this damsel had just emerged from its larval skin.
As I watched it crawled to the top of the leaf to begin to expand its wings and abdomen.
I walked on and at 07:46 I found this damselfly nymph. It was just beginning to split the skin on the back of the thorax.
I had time to change cameras to a macro lens with a flash. (It wasn't dark but the flash makes the background very dark.) This was at 07:49.
07:51. A couple of minutes later the skin has split across the back of the head.
07:53. The head and thorax have emerged.
07:55. The legs and wings are free.
08:12. The abdomen is almost out.
08:13. The damselfly has emerged and steps to one side. The blue colouration suggests this is an azure damselfly
08:26. The wings have expanded nearly to the tip of the abdomen.
08:44. The wings are now nearly fully expanded but the abdomen is still contracted.
As the next stage was going to take a while I went for a walk around the small pond and the surrounding hedges, hoping to see a dragonfly. When I returned at 09:16 the damselfly's abdomen had extended but was caught under one of the legs of the exuvia and it was struggling to get free.
I carefully lifted off the exuvia but it was left with a kink in its abdomen. The last photo I took was at 09:18 when it was getting breezy and very difficult to get a photo in focus as the leaf swayed in the wind.
On the way back I found another teneral azure damselfly, perhaps the same one I saw at first, showing what it is supposed to look like.
This is the first time I have witnessed an emergence. Next I want to see a dragonfly emerge (they do it slightly differently) and perhaps even use a tripod to get a time-lapse sequence or some video.
Also present yesterday were dozens of large red damselflies
a few blue-tailed damselflies,
and many, many common blue damselflies.
I also did the May bumblebee walk for the Bumblebee Conservation Trust this week. I saw lots of bumblebees, mostly feeding on bird's-foot trefoil, of which there is plenty.
Most of the bees were red-tailed bumblebees (Bombus lapidarius), including this queen.
I also saw early bumblebee (Bombus pratorum), buff-tailed bumblebee (Bombus terrestris), common carder bee (Bombus pascuorum),
and heath bumblebee (Bombus jonellus).
Butterflies included green-veined whites, walls, the first common blues
and another dingy skipper.
So for the second week running I didn't see a dragonfly and I have still only seen one this year, a broad-bodied chaser. I have been expecting four-spotted chasers which are now already three weeks later than last year. I hope they will be out and about next week.
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