Traditionally, the bird order Apodiformes contained three families: the swifts, Apodidae, the tree swifts, Hemiprocnidae, and the hummingbirds, Trochilidae.
In the Sibley-Ahlquist taxonomy, hummingbirds are separated from the Apodiformes as a new order Trochiliformes.
However the hummingbirds, swifts and crested swifts do all share anatomical similarities to one another, and their closest known living relatives, are probably the owlet-nightjars. The adaptation of a short, stout humerus has provided the hummingbird with ideal wings for hovering.
More on [ Apodiformes ]
Hummingbirds :: Backyard Birding

Allen's Hummingbird (Selasphorus sasin) - Photos plus facts about this bird's migration status, range, and identifying characteristics. Includes a range map.
Meta Description: [ A presentation of bird photographs, songs, identification tips, distribution maps, and life history information for North American birds, and a forum for commentary and discussion on birds. ]
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Anna's Hummingbird (Calypte anna) - Illustration of male and female, sound file, and description of this bird's seasonal movements and nesting.
Meta Description: [ A species account of Baltimore Oriole from Cornell Lab of Ornithology's Bird of the Week web site ]
Broad-billed Hummingbird (Cynanthus latirostris) - Photos, identification tips, and a taxonomy chart for this species.
Meta Description: [ A presentation of bird photographs, songs, identification tips, distribution maps, and life history information for North American birds, and a forum for commentary and discussion on birds. ]
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Chimney Swift (Chaetura pelagica) - Provides photos, a sound file, and data on this bird's behavior and physical traits.
ChimneySwifts.org - Promotes the conservation of Chimney Swifts through education, preservation of existing habitat, and creation of new nesting and roosting sites. Details about the North American Chimney Swift nest site research project and spring Chimney Swift sightings reports.
Common Swift (Apus apus) - Detailed information about the species for everyone from beginners and advanced researchers. Includes bibliography and APUSlife, a virtual magazine.
Meta Description: [ All about Common Swifts, Alles ueber Mauersegler, Le monde des martinets noir ]
Greg Lasley's Hummingbirds - Photos and notes of 14 hummingbird species from throughout the Americas.
Hummer/Bird Study Group - Dedicated to the study and preservation of hummingbirds and other neotropical migrants. Hummingbird species accounts, winter hummingbird banding, feeding tips, events, banding stations, and on-line store.
Operation RubyThroat - A cross-disciplinary international research and education project in which students, teachers, and others collaborate to study behavior and distribution of the Ruby-throated Hummingbird (Archilochus colubris).
Meta Description: [ Hummingbirds: The best site about attracting and studying hummingbirds, including feeders, banding, and student projects. ]
Phaethornis superciliosus (Long-Tailed Hermit) - Species account includes facts about this bird's diet, habitat, reproduction, and behavior.
Ruby-throated Hummingbird (Archilochus colubris) - Photo, range maps, physical traits, habitat, and diet of this species.
Meta Description: [ Photo of Ruby-throated Hummingbird, range maps, and facts about this bird's habitat, diet, and physical traits. ]
Rufous Hummingbird (Selasphorus rufus) - Photos, identification tips, range maps, and taxonomy chart.
Meta Description: [ A presentation of bird photographs, songs, identification tips, distribution maps, and life history information for North American birds, and a forum for commentary and discussion on birds. ]
SwiftWatch - Project to monitor the migration of the Chimney Swift (Chaetura pelagica).
Trochilids - Hummingbird Projects - Winter western hummingbird reports from Mississippi, Louisiana, and the eastern US, with extensive links to additional information.
Meta Description: [ Annual maps and tallies for North American hummingbirds which spend the fall and winter outside what was considered their normal range -- such as Rufous Hummingbirds wintering in the Eastern USA. ]
Vaux's Swift (Chaetura vauxi) - Describes this bird's physical traits, migration status, habitat, and nesting. Includes a taxonomy chart.
Meta Description: [ A presentation of bird photographs, songs, identification tips, distribution maps, and life history information for North American birds, and a forum for commentary and discussion on birds. ]
Winter Hummingbirds of Southwest Louisiana - Close-up photographs and notes by hummingbird bander Dave Patton.
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