恐龍卡第 1247 張，共 2 027 張

Navaornis

名字的意思： “Nava's bird, honoring William Nava who discovered the fossil site”1

吃：肉早期鳥類白堊紀晚期

Navaornis was a starling-sized bird that lived about 80 million years ago in what is now Brazil. It had a toothless, large-eyed skull that looked almost like a modern bird, but it belonged to an ancient group called enantiornithines. Its beautifully preserved skull let scientists see inside its brain for the first time in such an old bird.1 2

生存年代

84 到 66 百萬年前3

白堊紀晚期

化石發現地

William's Quarry at Sítio Paleontológico 'José Martin Suárez', Presidente Prudente, São Paulo State, Brazil1 3

最高速度

時速約 27 公里（17 英里）

飛行, 估計值

牠生活在什麼時候？

三疊紀

侏羅紀

白堊紀

2 億 5200 萬年前20114566，小行星撞地球

牠有多快？

走路的人 時速約 5 公里 (3 mph)

騎腳踏車的小朋友 時速約 12 公里 (7 mph)

Navaornis 時速約 27 公里 (17 mph)

一匹飛奔的馬 時速約 65 公里 (40 mph)

一隻獵豹 時速約 100 公里 (62 mph)

酷東西

趣味知識

Navaornis had a toothless skull with large eyes, just like many birds today, but its brain still had some ancient features like a small cerebellum and a weakly expanded telencephalon.1

Its skull is the best-preserved Mesozoic bird skull ever found, preserved in three dimensions without being flattened.1

Navaornis lived around 85 to 75 million years ago, during the Late Cretaceous period.1 2

The fossil site where Navaornis was found is very small, only about 6 square meters, but it has yielded hundreds of enantiornithine bird bones.1

Navaornis belongs to a group called Enantiornithes, which were the most diverse birds of the Mesozoic and lived on every continent except Antarctica.1 2

Its inner ear (bony labyrinth) was shaped like that of many modern birds but was much larger.1

Navaornis 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Navaornis 可能的樣子。這只是猜測：真正的動物可能長得不一樣，也沒有人知道牠真正的顏色。

給恐龍專家

學名: Navaornis
命名者: Chiappe et al. 20243
類群: 早期鳥類
科 / 演化支: Enantiornithes3
分類: Theropoda > Avialae3
岩石的年代: 84 到 66 百萬年 (Campanian / Maastrichtian)3
岩層: Adamantina3
國家: 巴西3
化石紀錄: The Paleobiology Database 收錄 1 筆3
發現: The fossil site was discovered in 2004 by William Nava, and the holotype skull was found in 2016. The species was named Navaornis hestiae by Chiappe and colleagues in 2024.1 3
仍有爭議: Scientists are still debating exactly how Navaornis is related to other enantiornithines, because its toothless skull and modern-looking head make it hard to place in the family tree.1