Protein.

Once, back when I used to do tai chi on the beach before school (when I lived in Costa del Mar), I was holding out my right leg to a perfect 90 degree angle from my torso in the "Descending Pendulum" position and I was so serene and motionless that a pair of lesser sand pipers took a break from their morning of flight and perched on my leg.

I found the moment so beautiful that a single slow tear trickled down my face as I ate them, feathers and all.