Hoverfly on Catawba Rhododendron in the Roan Mountain area, 7 July 2020.
This one is likely is genus Dasysyrphus (female, ~11 mm length):
bugguide.net/node/view/20058
Perhaps
Dasysyrphus venustus or a member of the Dasysyrphus intrudens complex.
Edit-1. Identified as likely D. intrudens complex at:
https://bugguide.net/node/view/1867103

I saw several instances of this gall/fungus on Catawba Rhododendron (Rhododendron catawbiense) in the Roan Mountain area. It appears to be:
Azalea Gall - Exobasidium rhododendri (Fuckel) C.E. Cramer

Synonym: Exobasidium vaccinii var. rhododentri
Reference:
www.marylandbiodiversity.com/viewSpecies.php?species=10406

Grays Lily (or Roan Lily) - Lilium grayi
Our small party found three of these in the Roan Mountain area, two along trails and one along a roadside. This one was very convenient for photography and could be photographed easily without stepping off a trail. I used, mostly, a long telephoto lens to make sure I did not get too close to this sensitive plant. Several blossoms appeared to have been damaged by nectar thieves, with holes at the base. I saw ants visiting these perforations, but I suspect a larger insect made them. Elevation is about 5600 feet (1,700 meters). This was very close to the North Carolina/Tennessee state line.

Thyme-leaved Bluet, Creeping Bluet - Houstonia serpyllifolia
These were along a trail near Carver's Gap at Roan Mountain, right along the North Carolina/Tennessee border. They have a deep blue flower and a creeping stem with tiny round leaves. (You can see this in the habitus photo here on iNaturalist.)

This was blooming throughout shady valleys on a recent trip to Roan Mountain, Tennessee. Flowers are perhaps more showy in bud, when they are pink. I neglected to photograph that!
Rosebay Rhododendron - Rhododendron maximum

These flies seem to love the heat--I often find them basking in the sun on torrid days. This one was found along the old Bynum Bridge in Chatham County, North Carolina on 16 July 2020. They are parasitoids of carpenter bees, Xylocopa species. Sometimes I see them investigating the edges of structures, perhaps looking for the nests of their hosts.
Xenox tigrinus - Tiger Bee Fly (female?)
bugguide.net/node/view/2803
I am guessing the genus name, Xenox, is an allusion to the alien-like appearance of the fly's eyes. (Greek Xenos = stranger, alien.) The name was given by entomologist Neal Evenhuis in 1985. Speculation: perhaps an homage to the 1982 movie, E.T.?

I found this male velvet ant at a lighted window in a suburban neighborhood in Durham, North Carolina (USA). In this group of wasps, females are wingless and terrestrial, while males fly. Tentative ID:
Timulla vagans (male, length ~11 mm)
bugguide.net/node/view/68201
Series also posted at:
bugguide.net/node/view/1860871
Everything seems consistent with key (as far as I can follow it) and description for T. vagans in this reference on the genus Timulla:
Mickel, C.E. 1937. The mutillid wasps of the genus Timulla, which occur in North America north of Mexico. Entomologica Americana 17: 1-119.
Available from Biodiversity Heritage Library:
http://biodiversitylibrary.org/page/50671648
Quoting:
The male can be distinguished by the brush of white hairs on the scape beneath [yes, though hard to see], the dark fuscous wings [yes], and the sparse, black pubescence of the abdominal tergites [yes]. The females as well as the males vary a great deal in size; length of females varies from 6 to 14 mm; the males from 9 to 19 mm.

Southern Red Oak - Quercus falcata
Classic shape of leaves and a detail image showing the tawny tomentum (a layer of matted woolly down on the surface of a plant) underneath.
I have been trying for some time to learn to differentiate this from the very similar Q. pagoda.
What I think (!) is pagoda is actually more common in this immediate area, which is very hydric. This is one of the few "classic" falcata I have found in this area. However go to a less damp area and it is very common.

I found this little beetle on vegetation in a suburban yard in Durham, North Carolina.
Megapenthes rufilabris (length 6 mm)
bugguide.net/node/view/525022
Also uploaded and identified at:
bugguide.net/node/view/1857350

I found this mint family plant blooming at the edge of a field in Bynum, North Carolina on a hot summer morning. This was a new one for me, but it keyed out easily in my trusty Newcomb's Wildflower Guide. Note how the stamens project out from the base of each flower.
American germander (Wood Sage) - Teucrium canadense

This little bee was gathering pollen in a field at Bynum, North Carolina. I believe it is:
Two-spotted Longhorn - Melissodes bimaculatus (female)
bugguide.net/node/view/69274
One white spot on the side of the abdomen is maybe just visible in one frame. In another frame the proboscis, or glossa, is protruding. I'm not sure if there is a technical difference between those two.
Plant is, I think
Bearsfoot, Leafcup - Smallanthus uvedalia (Smallanthus uvedalius), formerly Polymnia uvedalia

I found this vine growing along a woodland edge in Bynum, North Carolina. Having puzzled over various references, I think the correct name is:
Anglepod - Gonolobus suberosus
There is a fair amount of taxonomic confusion in this group, at least it is confusing to me!

Returning to my new site for this species in suburban Durham, North Carolina, I found a few females at last! (There were also two or three larvae still active in their burrows.) I had seen only males on 10 July. I saw one mating pair, but they uncoupled as I tried to move in for photographs.
Virginia Metallic Tiger Beetle - Tetracha virginica (female, length ~20 mm)
bugguide.net/node/view/3024
Females lack the pads on the front tarsi prominent on males. They are also a bit bigger than the males.
Edit. A couple more shots added from this same site the next night. I think this was likely the same beetle.

A couple of these beautiful flies were on display in fields near the Bynum Bridge (Chatham County, NC, USA) on the very muggy morning of 16 July 2020.
Yellowjacket Hover Fly (Virginia Flower Fly) - Milesia virginiensis (female, length ~ 20 mm)
bugguide.net/node/view/2837
Feeding on Common Mullein, Verbascum thapsus.
Dichoptic eyes indicate this is a female. Male has eyes that meet in the center (holoptic), at least partly, see:
https://bugguide.net/node/view/70352/

I spent one late evening at Roan Mountain State Park (Tennessee, USA) checking for insects at lighted structures.
Scorpionfly - Panorpa species (female)
bugguide.net/node/view/9217

I spent one late evening at Roan Mountain State Park (Tennessee, USA) checking for insects at lighted structures.
Eugonobapta nivosaria - Snowy Geometer
bugguide.net/node/view/11109
This was another new one for me. Its surface really is a blinding, reflective white. Rather hard to photograph because of the glare from the white scales.

I spent one late evening at Roan Mountain State Park (Tennessee, USA) checking for insects at lighted structures.
Euclea delphinii - Spiny Oak-Slug Moth (female, based on thread-like antennae--male has feathery antennae)
bugguide.net/node/view/424

I spent one late evening at Roan Mountain State Park (Tennessee, USA) checking for insects at lighted structures.
Inverted Y Slug Moth - Apoda y-inversum
bugguide.net/node/view/29615
A new one for me--very pretty pattern!

I spent one late evening at Roan Mountain State Park (Tennessee, USA) checking for insects at lighted structures.
Apatelodes torrefacta - Spotted Apatelodes
bugguide.net/node/view/4765
Always one of my favorites--I love their odd posture.