Burung laut: Perbedaan antara revisi
Konten dihapus Konten ditambahkan
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Baris 11:
[[Loon]] dan [[Titihan]], yang bersarang di [[danau]] namun melewatkan musim dingin di laut, biasanya dikelompokkan dalam burung air tawar, bukan burung laut. Begitu pula suku [[Anatidae]] (bebek-bebekan), yang meskipun beberapa anggotanya hidup di [[laut]] semasa [[musim dingin]], berdasarkan kesepakatan dianggap bukan burung laut. Banyak jenis burung perancah dan bangau yang hidup di pesisir [[pantai]], namun tidak pula dikategorikan sebagai burung laut.
== Evolusi dan catatan fosil ==
<!--Seabirds, by virtue of living in a [[geology|geologically]] depositional environment (that is, in the sea where [[sediment]]s are readily laid down), are well represented in the [[fossil]] record.<ref name = "Burger"/> They are first known to occur in the [[Cretaceous]] Period, the earliest being the [[Hesperornithiformes]], like ''Hesperornis regalis'', a flightless loon-like seabird that dove in a fashion similar to grebes and loons (using its feet to move underwater)<ref>Johansson LC, Lindhe Norberg UM. (2001) "Lift-based paddling in diving grebe." ''J Exp Biol.'' '''204'''(10) :1687–96.[http://jeb.biologists.org/cgi/reprint/204/10/1687]</ref> but had a beak filled with sharp teeth.<ref>Gregory, J. (1952) "The Jaws of the Cretaceous Toothed Birds, Ichthyornis and Hesperornis" ''Condor'' '''54'''(2): 73–88 [http://elibrary.unm.edu/sora/Condor/files/issues/v054n02/p0073-p0088.pdf#search=%22The%20Jaws%20of%20the%20Cretaceous%20Toothed%20Birds%2C%20Ichthyornis%20and%20Hesperornis%20%22]</ref>
[[File:Hesperornis.jpeg|thumb|350px|right|alt = skull of ancient seabird with teeth set into bill|The Cretaceous seabird ''Hesperornis'']]
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