City Creek Nature Notes – Salt Lake City

June 27, 2017

June 26th

Wasp Explosion and Return of the Water Striders

4:30 p.m. It reaches 100 degrees in the valley; the estival heat has returned. The stream level continues to decline, and the pond at picnic site 5 is beginning to reform under the higher spring run-off. At its banks, a wetted sand and silt line has developed. Here, about fifteen Western Yellowjacket wasps land and take sips of water. In a small pocket of calm water, the season’s first water strider (Aquarius remigis) appears (Sept 12th). A similar scene is found at the water seeps below picnic site 6. Checking the stream and its opposite banks at several times along the first mile, I find areas with thirty or forty Yellowjackets. One one bank,a Western tiger swallowtail butterfly lands also seeking to take a drink. Individual Yellowjackets start dive bombing the swallowtail, and after the fourth, the butterfly move down canon. What the yellow jackets are eating is unclear. I find one crawling over a roadside weed that no longer has flowers. It crawls to the juncture between a leaf and the plant’s main stalk where a white liquid oozes out. The wasp spends a minute drinking before flying off. I estimate that there are about 400 wasps along the first mile of road: enough for two colonies. At picnic site 1, a Prairie rose (Rosa setigera), a cultivar, with delicate pink blossoms that surround fifty stamens, blossoms.

Another insect explosion begins. On Utah milkweed plants, a black, yellow-stripped flower loving borer beetle (Calloides nobilis var mormonus Schaeffer) is found. Several are along the road, either feeding on pollen or hovering in flight.

* * * *

Per Thoreau’s “Journal” on June 26th, 1853, he notes that air is warmer after a thunderstorm. He describes a summer sunset and a faint afterglow three minutes after the sun falls below the horizon it lights up low clouds in the sky. He notes how in summer light, the outlines of mountain ridges are more distinct. On June 26, 1856, he describes the last remaining Native American, a seventy-year old woman, who lives alone in his neighborhood.

* * * *

On June 26th, R. J. Robinson, a consulting engineer who obtain water rights in City Creek Canyon, offered to sell his rights to the City (Salt Lake Tribune). On June 26th, 1908, the Salt Lake Tribune reported that Chin Wo, who had been sentenced to the City Creek chain gang road crew for vagrancy and who was believed to have mental health issues, attacked police guard Kast with a shovel.

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