Here's a great example of disruptive coloration in action. With disruptive coloration, you are not trying to match some background perfectly ... like a green katydid on a green leaf ...
Rather, you are using spots, stripes, or a combination of the two to break up your outline so you vanish into whatever background is present.
Some backgrounds are better than others for vanishing.
This pygmy rattlesnake was crossing a gravelly lime rock road in the woods on a wildly productive critter ride last Sunday... more pics to come this week from that ride.
I took a few pics and then encouraged it to slide on off the road into the safety of the bush. This is our smallest rattlesnake here in Florida, but you still need to give it plenty of space as it packs a powerful hemotoxic venom like it's bigger cousins, the diamondback and canebrake rattlers.
...So watch where you step.