
Although they are common in this general area, I don't think I've seen mountain bluebirds up here on the property.
Their feathers are not actually blue. Small air pockets and ridges allow wavelengths of other colors to pass through, while shorter blue wavelengths are scattered, appearing blue to our eyes. A similar process creates our blue sky. Our atmosphere allows the wavelengths of colors like red and yellow to pass through, while blue is scattered across the sky. Out of the sun, bluebirds appear brown or gray.

We do have the Stellars Jay, which I think always looks blue.

