After Olson, 1985, Feduccia, 1980, 1996 and Ericson, 1996, modified to accommodate Hughes, 2000

<==o “Primitive Land-bird Assemblage”
   |?- Cariamae (käärmekurkimaiset nykylinnut) [paraphyletic??!!]
   `--+?- Musophagiformes sensu Hughes & Baker, 1999
      `--+?- Falconidae [Falconiformes] (jalohaukat)
         `--+?- Cuculidae [Cuculiformes] (käkilinnut)
            `--+?-o Pandionidae (sääkset, kalasääsket)
               |  |?- †Pandionidae genera et species indet. aff. Pandion [Egypt, Eocene]
               |  `--o Pandion Savigny, 1809 (sääkset, kalasääsket)
               |     |-- †P. lovensis
               |     |-- †P. homalopteron Warter, 1976
               |     `-- P. haliaetus (Linneus, 1758) (sääksi, kalasääski)
               |?-o Sagittariidae (sihteerilinnut)
               |  |--o †Pelargopappus
               |  |  |-- †P. schlosseri
               |  |  `-- †P. magnus
               |  `-- Sagittarius serpentarius (J.F. Miller, 1779) Hermann, 1783 (secretary bird; sihteeri)
               |?- Accipitridae [Accipitriformes] (haukat)
               `-- Anomalogonatae

Note:

This is an alternative phylogeny of primitive landbirds based on works of Feduccia, 1980, 1996 and Olson, 1985.

This tree is modified from author's preferred tree to accommodate a recent phylogenetic analysis of Cuculidae (cockoos) by Hughes, 2000. In this work she uses a monophyletic Musophagiformes [Musophagidae + Ophistocomidae] as outgroup.

 

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