It was a cloudy and overcast day. A large blue heron was perched on the “edge” of the roof line. I was two stories below, so he or she showed no fear, and I was able to take all the pictures that I wanted while he preened. Here are two that I believe demonstrate today’s theme. “edge”.
Note: The roof is peaked. While I straightened the photos a bit, I did not make the lines flat, because then the bird looked crooked.
tybeetabby 
Great photos! You can really see the details. And I agree, you wouldn’t want a crooked bird. Good choice to align with the bird’s leg.
Thank you. I actually tried it, the bird was tilted at a 45 degree angle. Looked truly weird.
Thank you. Birds are pretty cool and blue herons are one of my favorites.
Great photos! It’s amazing how birds can twist their heads around behind them like that.
Beautiful edges! Soft and curvy on the bird and straight on the roof! Good contrast.
Thank you.