bucket of bugs

I left a five gallon bucket filled to the rim with water outside overnight in Slabtown. The next morning the water level was two inches lower and this drama was occurring. What's up with the green v black thorax? Fashion, class, sex? What is the dragonfly up to? Need an entomologist. Easier to see in color

quercus macrocarpa

Light requirement: tree grows in full sun Soil tolerances: clay; loam; sand; acidic; alkaline; extended flooding; well-drained Drought tolerance: high Aerosol salt tolerance: high Soil salt tolerance: good Outstanding tree: tree has outstanding ornamental features and could be planted more--

Grows in the 48 contiguous states. This one is in a tree tube. Planted ten in April.
Wikipedia

Black Hills of South Dakota

Wyoming doesn't have sales tax
We left interstate 90 for awhile today, dipped down through Thunder Basin, Osage, Newcastle and Custer, sneaking up on the Mount Rushmore National Monument from the south.

The Park Service lady said they have about three million visitors a year. Presidents Washington, Roosevelt and Lincoln look pretty good. I didn’t recognize Jefferson.
The monument is smaller than I expected, I am surprised it hasn’t been stolen.