Many hummers will emit a loud chatter when their territory is invaded. In courtship the male first finds a ready female then lures her through posturing and sound. Then he engages in a nuptial flight during which he may repeatedly fly in a large U-shaped pattern. Using oil from a gland near their tail they groom their wings, abdomen, tail feathers and back. Stroke by stroke they tend to the veins of each feather.
Hummers often groom their heads and necks with their feet, uses the front three claws like a comb.
Sometimes they will groom their beak or neck by rubbing them against a twig. Sometimes a grooming hummer will grasp its bill and slide along it with its claws. Hummers also take sunbaths, positioning their breast towards the sun and fluffing out. They extend their neck and spread their tail. They may stretches one wing then the other, then lowers their head while stretching the wings upward.