恐龍卡第 1801 張，共 2 027 張

Tianyuornis

吃：肉早期鳥類白堊紀早期

Tianyuornis was a small, feathered bird that lived about 125 million years ago, during the time of the dinosaurs. It had long legs and probably ran around on the ground, using its wings for balance or short flights.1 3

生存年代

126 到 121 百萬年前3

白堊紀早期

化石發現地

Fossils were found in the Yixian Formation in Inner Mongolia, China.1 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)

Tianyuornis 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

Tianyuornis had teeth in both its upper and lower jaws, which is unusual for birds and helped scientists confirm that some ancient birds still had teeth.1 2

Its lower jaw (dentary) was straight, while other similar birds had a curved, S-shaped jaw. This unique feature helped scientists identify it as a new species.1 2

Tianyuornis was about the size of a modern phoebe, a small songbird, making it quite tiny compared to many dinosaurs.1

It had long hindlimbs (legs) compared to its forelimbs (wings), which suggests it was a good runner.1 2

The only known fossil is a nearly complete and articulated skeleton of a subadult, meaning it was not fully grown when it died.1 2

Tianyuornis lived in a lake environment, and its fossils were found in lake deposits.1

Tianyuornis 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Tianyuornis 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: Tianyuornis
命名者: Zheng et al. 20143
類群: 早期鳥類
科 / 演化支: Hongshanornithidae3
分類: Theropoda > Avialae3
岩石的年代: 126 到 121 百萬年 (Barremian)3
岩層: Yixian3
國家: 中國3
化石紀錄: The Paleobiology Database 收錄 1 筆3
發現: Tianyuornis was named by Zheng Xiaoting and colleagues in 2014, based on a nearly complete skeleton found in the Yixian Formation in Inner Mongolia, China.1 3
仍有爭議: Scientists debate whether all members of the Hongshanornithidae family, which includes Tianyuornis, had teeth, but this new fossil helps confirm that they did.2