City Creek Nature Notes – Salt Lake City

September 20, 2016

July 29th

Filed under: Dragonfly, Insects — canopus56 @ 10:35 pm

Dragonfly Squadron

After the peak of the summer heat passes, afternoon thunderstorms form along the Wasatch Front. In the afternoon, a ledge of thunderstorms built up along the eastern edge of the Wasatch. Around 4 p.m. the canyon is still in harsh sunlight but a cool breeze blows from the storm front up City Creek Canyon road. I jog through a flock of 10 mature dragonflies who are hovering stationary in the breeze. They’re flying formation like a mission of B-25 bombers from World War II. The first immature dragonflies made their appearance in the canyon in late April. Then they were only an inch long and light blue. Now they have grown into their adult 3 – 4 inch size and are dark black or purple in color. I did not realize that dragon flies were pollinators, but a few days before I had seen one grazing on the compound micro flowers of a Russian thistle.

October 6th, Supplemental Note: The small blue dragonflies may have been a separate species, i.e. – the Circumpolar Bluet (Enallagma cyanigerum). The larger dragon or damselfy is unidentified.

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