House Sparrow - Passer domesticus
This is Bob. He sleeps on my deck every night. Oddly, he sleeps with his eyes open. He is completely asleep in this picture! I know this because I climbed up on my railing and put my hand right in front of him, and he didn't even twitch. Nothing makes him stir - not me or my flash. I am always quiet near him though so I don't wake him.
I was curious why he sleeps with his eyes open, and discovered that this behavior is called Unihemispheric Slow-Wave Sleep. It means that an animal can sleep with one half of the brain, while the other half remains alert. This is in contrast to normal sleep where both eyes are shut and both halves of the brain show reduced consciousness.
The house sparrow is a bird of the sparrow family Passeridae, found in most parts of the world. A small bird, it has a typical length of 16 cm and a weight of 24–39.5 g. Females and young birds are coloured pale brown and grey, and males have brighter black, white, and brown markings.