Aries is blue and Ondine is jet black, yet it is Aries who disappears outside at night. His coat has exactly the right depth of color to blend inconspicuously into his surroundings. You get the feeling he knows it, too, because he stands perfectly still and watches as you try to find him. It's unnerving. Ondine is as easy to locate as Aries is hard; she is never still, and the eye is quick to spot inky black shadows flying by.
Although when you see it it's too late for you anyway.