Naturally occurring hybrid of Quercus falcata and Q. nigra, which often has leaves similar in appearance to Q. georgiana but the buds and acorn cap scales are different. Both parental species are present here.

A Drain Fly (Clogmia albipunctata), photographed in Sunnyvale, CA. Identified by comparing with all of the Moth Flies (family Psychodidae, subfamily Psychodinae) depicted in the reference cited below; C. albipunctata seemed to be the best fit in terms of wing shape, wing ornamentation, hairiness, and antenna characteristics.

Note: C. albipunctata is also known as the Bathroom Moth Midge.

References:

1. "Subfamily Psychodinae" (n.d.), BugGuide. Retrieved on 1/10/20 from https://bugguide.net/node/view/64068

"Fimbristylis annua (Allioni) Roemer & J.A.Schultes"; achenes lenticular, without a perianth, without a persistent style base/tubercle (pic 2), and with warts scattered over the surface; style branches 2 and fimbriate; plant a small, shallowly-rooted annual.

Found these on a dead, still standing pine tree, that has lost most of its bark. Initially I found the two pictured together. A few days later, they were gone and the white one pictured above was located a few inches from where the initial ones were.
The second photo, was the next day, the surface has started to smooth out, just overnight. I will add another picture of it today, so I can document the changes.