Cows - A Warning

A common theme in nature is some of the brightest, most unusually colored animals and plants are poisonous or dangerous. The combination of being poisonous and sending off a warning is called aposematism. Aposematic coloration must be easy to detect, recall and associate with a defense. This allows predators to identify the animals from a longer distance away and allots more time to make a decision whether to attack or not, based on passed experiences with the prey. These past experiences could be distastefulness, noxiousness or speed of the prey.
examples include:

that's a pretty nasty  group of characters and a very fancy mosiac (I might add)

So why this quick, down and dirty biology lesson (which eventer79 will probably correct in some way, pfft)

Rosey of Dung Hoe comments and submits:

I am starting small. (but you have a BIG message)

My radar is up: bright colors, murals half painted with dribbles rolling down in mid-paint. What happened to the painter. I need to do some research. Also Alpine... why Alpine. It could be a clue.

ah ha... Cows attack cars. Angry cows ... got it.

OMG, Get out of the way Jimmy! Angry cows propelled themselves from the cliffs. Hence the secretive alpine warning. Watch out for cows in higher elevations.

oh no, Kamikaze Cows are attacking cars with boulders

Whew, thanks Rosie. We will all be better for knowing the danger of killer dairy cows. I cannot give you any points for a painting but...

Creativity Bonus

For spotting the inherent risk of cows, hills and mountains and posting the warning: 2 points

Total: 2 points

 I don't know about the rest of you guys, but I'm getting some protection:

This should have given the locals a clue: