Here a couple of photos I took of the real thing. Both in different locations.
Shows the camouflage effects well - image them from a distance.
Picture 1 - Asleep.
Not the "real" colours as there is a tint to this photo due to the light angle and time of day.
Picture 2 - Even faster asleep. In case you have ever wondered how owls sleep here you are - note the eyes!
This picture shows the truer colours - you can see from this that Johan's artwork is very accurate colour and texture wise.