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The 20 pages that link to Evolution of birds, each with the reason it gives.
Jehol BiotaRelated: Jehol birds and close relatives document early stages of avian evolution.
FalconNarrower topic: Falcons are one branch of the much broader evolutionary history of birds.
SaurischiaRelated: It traces the living continuation of the saurischian theropod lineage.
CoraciiformesNarrower topic: Coraciiformes is one branch in the diversification of modern birds.
FurculaRelated: The furcula is a shared skeletal feature tracing dinosaur ancestry in birds.
NeornithesRelated: Neornithes is the surviving crown branch of that long evolutionary history.
HesperornisNarrower topic: Hesperornis documents a specialized, aquatic branch of bird evolution.
Evolution of reptilesRelated: It is the surviving continuation of one major dinosaur lineage.
Owlet-nightjarRelated: Owlet-nightjars' placement among bird lineages is still studied.