Hummingbirds have many skeletal and flight muscle adaptations which allow the bird great agility in flight. Muscles make up 25-30% of their body weight, and they have long, blade-like wings that, unlike the wings of other birds, connect to the body only from the shoulder joint. This adaptation allows the wing to rotate almost 180°, enabling the bird to fly not only forward but fly backwards, and to hover in front of flowers as it feeds on nectar, or hovers mid-air to catch tiny insects. During hovering, (and likely other modes of flight) ruby-throated hummingbird wings beat 55 times per second. Wikipedia
On a Jamaican Dogwood tree: Leffis Key FL
We had a migratory fall out in Florida yesterday...there were dozens of hummers on this tree.