Anna's Hummingbird wings beat about 40-50 times per second in normal flight, 30% of a hummingbird's weight consists of flight muscles.
Hummingbirds fly about 25mph in normal flight and up to 40mph in a courtship dive.
The heart beats about 250 times per minute while at rest, about 1,220 per minute while flying, but slows to 50 beats per minute at night (this is called torpor). It takes about 250 breaths per minute while at rest
Hummingbirds have a mass of about 3-4g; they may nearly double their mass prior to migration by putting on extra fat. A hummingbird can consume up to 50% of its weight in nectar each day.