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There were lots of adults of four species: of the dragonflies, Four-spotted Skimmer (Libellula quadrimaculata) and Hudsonian Whiteface (Leucorrhinia hudsonica); of the damselflies, Western Forktail (Ischnura perparva) and Western Red Damsel (Amphiagrion abbreviatum). The skimmer and whiteface were emerging in large numbers as well...
|A female Four-spotted Skimmer emerging. Note the exuvia (shed nymphal skin) at the base of the sedge stem.|
|An emerging female Hudsonian Whiteface still holding on to its exuvia. Another one is in the background to the left.|
I never saw any darners flying around, but obviously many have emerged recently as indicated by the numerous exuviae in the water. Several Canada Darners (Aeshna canadensis) were in the process of emerging. That species is one of the earlier of the montane darners to make an appearance and I assume most of the abandoned darner exuviae belong to them...
|On left, two darner exuviae are floating on the water surface. On right a female Canada Darner is almost done emerging.|
I was surprised to find a Subarctic Darner (Aeshna subarctica) emerging. Within Oregon, this species is known from only a few sites in the Cascades south of Mt. Hood, but it is most abundant at Camas Prairie. The earliest known flight date for the species in Oregon was 27 July, however, so this is more than a month earlier.
|An emerging male Subarctic Darner clinging to its exuvia.|
Another surprise was an emerging Brush-tipped Emerald (Somatochlora walshii) which beat the previous earliest flight date of 6 July in Oregon.
|On left, an emerging male Brush-tipped Emerald clinging to its exuvia. The same individual on the right after it was carefully relocated in order to collect the exuvia. You can just make out the "brushes" on the tip of the abdomen.|