 Incubation lasts 14 to 23 days, depending on the species, ambient temperature, and female attentiveness to the nest.The mother feeds her nestlings on small arthropods and nectar by inserting her bill into the open mouth of a nestling, and then regurgitating the food into its crop.Hummingbirds stay in the nest for 18-22 days, after which they leave the nest to forage on their own, although the mother bird may continue feeding them for another 25 days.