Usnea (witch's hair) on photos - then and now

[GreenRain]

The lichen Usnea (witch's hair) is visible on some Dyatlov group photos
https://en.wikipedia.org/wiki/Usnea

Film N1.
Frame 18 with Mansi marks - with Usnea (similar to frame N21 on film N5 and frame N27 on film N4).
Frame 19 - with Usnea.
Frame 20 - with Usnea.
Frame 21 with Zina Kolmogorova - with Usnea.
Frame 22 - with Usnea.
Frame 23 with ski trail - unknown
Frame 24 on Auspiya river - no Usnea.
Frame 25 with Mansi marks - with Usnea.
Frame 26 - no Usnea.

Film N3 - no Usnea.

Film N4.
Frame 24 - no Usnea.
Frame 25 - no Usnea.
Frame 26 - unknown.
Frame 27 with Mansi marks - with Usnea (similar to frame N21 on film N5 and frame N18 on film N1)

Film N5
Frame 21 with Mansi marks - with Usnea
Frame 22 - unknown.
Frame 23 - no Usnea.
Frame 24 - no Usnea.

Loose photos.
Frame 4 with Mansi marks - unknown
Frame 5 with Mansi marks - with Usnea (similar to frame N25 on film N1)
Frame 6 with tent - no Usnea
Frame 8 - unknown

Contemporary photos with Usnea from Expedition-2022
For example