Came upon this video today that talks about various aspects of camouflage, how it has evolved for different species, how it teaches us about how predator minds work, and how it is still evolving today.
It's about 10 minutes long, and the first section discusses the Tawny Owl. The more northern ones are lighter,due to the climate, but as climates change, the Tawny must change with it.
I've linked the full video which goes into other species like snakes, deer, tigers, and insects, and a quick link to the owl if you're in a hurry.
Full Video
Straight to the Owls