鳥類的演化始於侏羅紀時期,最早的鳥類源自名為近鳥類獸腳亞目恐龍演化支[1] 侏羅紀晚期的印石板始祖鳥被認為是最早的鳥類。在6600萬年前的大滅絕事件中,至少有四支不同的鳥類倖存下來,分別是古顎類鴕鳥及其近親)、齒雁類鴨子及其近親)、泛雞形類及其近親)和新鳥小綱(其他鳥類)。

參考資料

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