Traditionally the bird order Apodiformes contained three families: the swifts, Apodidae, the tree swiftsHemiprocnidae, and the hummingbirdsTrochilidae.
In the Sibley-Ahlquist taxonomy, hummingbirds are separated from the Apodiformes as a new order Trochiliformes.
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... is spread out with 29.3% under the age of 18, 9.6% from 18 to 24, 30.3% from 25 to 44, 20.9% from 45 to 64, and 9.8% who are 65 years of age or older. The median ...