Here's a pic of a young bobcat that got hit in front of my coworkers house that can also be used as a reference. One of my deer stands is on the edge of some CRP ground. I watched one of these walk down my shooting lane in the CRP and stop 40 yds in front of me, sit down, and start grooming itself. Even though I was staring right at it, when ever it would stop moving, it would completely disappear against the various shades of tan weeds and shadows behind it. Hen pheasants can do the same thing. To me the key is alternating light and dark colors, but doing so with more of a fade instead of having distinct edges. Also, the dark to light fade always happens in the same direction.
View attachment 1722965
You got some good points about them blending in
I studied how and why animals such as rabbits and deer can do the same thing
1) their grayish/brownish/tanish color simply blends in well with background
2) but even more importantly
---they have hair fibers that are hollow/colorless
the phenomenon that happens next is, that hair then acts like a fiberoptic
to then mirror it's immediate surrounding background
in effect, their hair acts like a Chameloen or Octopus to blend in to its surroundings
I observe this constantly with the deer that walk through my back yard
I have taken many pictures of deer not 20 yards away to try to demonstrate this
such as what you said
"as soon as it stops, it disappears, like the legendary bigfoot, the all time hide and seek champion"
the pictures of the deer in plain sight do no good because there is no proof a deer is even there lol
even when it is 20 yards right in front of you
It is literally amazing
---
I used the same concept of being able to mirror and mimic the background for crafting a ghillie
works pretty good for sneaking up on animals
1) 20 feet away - no Ghillie
2) me in the Ghillie
3) making it obvious where I was
4) fox I stalked for awhile and snuck up on
5) fox got so comfy he laid down to take a nap with me close by in the Ghillie