恐龍卡第 0906 張，共 2 027 張

Jian

名字的意思： “one-winged bird from Chinese mythology”1

吃：肉迅猛龍類白堊紀早期

Jian was a small, feathered dinosaur that lived about 120 million years ago. It had long feathers on its arms and legs, like four wings, and probably glided through the air like a flying squirrel. Scientists think it hunted early birds, because its fossils were found in a place full of bird bones.2

生存年代

121 到 113 百萬年前3

白堊紀早期

化石發現地

Changma Basin, Gansu Province, northwestern China1

翼展

1.2 m (3.9 ft)2

最高速度

時速約 43 公里（27 英里）

跑步, 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

牠有多大？

牠的翅膀有多寬？

跟 2.5 隻家貓從鼻子接到尾巴一樣長能在 8.4 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Jian 跟「你」比起來有多大？

只是在你的瀏覽器裡算算數學。什麼都不會被儲存或傳送出去。

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)

Jian 時速約 43 公里 (27 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

Jian is one of the biggest microraptor dinosaurs ever found. Its upper arm bone is about 10 centimetres (4 inches) long.2

Jian had a very long coracoid bone in its shoulder, longer compared to its arm than in any other microraptor.1

The only fossil of Jian found so far is an arm and shoulder. No other bones have been discovered yet.1

Jian lived alongside hundreds of early birds called Gansus yumenensis. Its fossils were found in the same rock layer as many bird skeletons.1

Scientists think Jian may have been the predator that left behind crushed bird bones at the site, similar to pellets coughed up by modern owls.2

Jian probably could not fly like a bird, but it could glide using its four feathered limbs, much like a flying squirrel.2

Jian 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Jian 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: Jian
命名者: Zhou et al. 20263
類群: 迅猛龍類
科 / 演化支: Dromaeosauridae3
分類: Theropoda > Dromaeosauridae3
岩石的年代: 121 到 113 百萬年 (Aptian)3
岩層: Xiagou3
國家: 中國3
化石紀錄: The Paleobiology Database 收錄 1 筆3
發現: Jian was named in 2026 by a team of scientists including Zhou, Lamanna, Poust, Li, You, and O'Connor. The only fossil found is an arm and shoulder from the Xiagou Formation in China.3 1
仍有爭議: Scientists are not sure if Jian could truly fly or only glide, because only its arm and shoulder bones have been found.2