City Creek Nature Notes – Salt Lake City

November 7, 2016

November 7th

Filed under: Birds, Blacked-Headed Chickadee, mosquitoes, People, Scrub jay, Seasons — canopus56 @ 10:42 pm

Blue Paint

3:00 p.m. With the leaves gone, blue paint marks on the trunks of trees in the first mile now stand out. They are on the trunks of trees near knotholes and on hollow, rotted limbs. In late August, there were two interns from the Salt Lake County Mosquito Abatement District walking the canyon diligently peering into each hole and marking new ones. Andrew Dewsnup of the District explained that the holes and depressions can breed a particular species of mosquito (possibly the Tree-hole mosquito (Aedes triseriatus). The District notes the location of each hole with paint and with a GPS locator. In the spring, they will return to count the number of swimming larvae in each hole, and from that information, the District decides if chemical spraying is needed.

A flock of Black-headed chickadees can be heard in scrub oaks today along with scrub jays. On Nov. 7, 1857, Thoreau remarked in his “Journal,” a similar association in his eastern forest between Fall, chickadees and eastern jays.

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