恐龍卡第 0213 張，共 2 027 張

Avimaia

名字的意思： “bird mother”1

吃：肉早期鳥類白堊紀早期

Avimaia was a small bird that lived about 120 million years ago. It is special because scientists found an egg still inside its body. This helps us learn how ancient birds had babies.2 1

生存年代

121 到 113 百萬年前2

白堊紀早期

化石發現地

Changma, Yumen, Gansu Province, northwestern China2 1

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)

Avimaia 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

Avimaia is the only fossil bird ever found with an unlaid egg still inside its body.1

The eggshell of Avimaia was very thin and had multiple layers. Scientists think this happened because the egg stayed too long inside the mother.1

Avimaia's leg bones contain medullary bone. This is a special tissue that only female birds make when they are ready to lay eggs.1

The egg of Avimaia was flattened and measured about 5.2 square centimeters.1

Avimaia lived during the Early Cretaceous period, about 121 to 113 million years ago.2

The name Avimaia means 'bird mother' in Latin, because the fossil is a female with an egg.1

Avimaia 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Avimaia 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: Avimaia
命名者: Bailleul et al. 20192
類群: 早期鳥類
科 / 演化支: Enantiornithes2
分類: Theropoda > Avialae2
岩石的年代: 121 到 113 百萬年 (Aptian)2
岩層: Xiagou2
國家: 中國2
化石紀錄: The Paleobiology Database 收錄 1 筆2
發現: Avimaia was named in 2019 by Alida Bailleul and her team. The fossil was found in the Xiagou Formation in China.2 1
仍有爭議: Scientists are not sure why the eggshell of Avimaia was so thin and had multiple layers. It might have been a health problem or a normal part of its reproduction.1