恐龍卡第 0867 張，共 2 027 張

Imparavis

名字的意思： “odd bird”1

吃：肉早期鳥類白堊紀早期

Imparavis was a tiny, toothless bird that lived about 120 million years ago in what is now China. It was one of the first of its kind to lose its teeth, and it had strong wings that might have let it flap really fast, like a modern quail or puffin.2

生存年代

121 到 120 百萬年前4

白堊紀早期

化石發現地

Near Toudaoyingzi village in Jianchang County, Liaoning Province, China1 3

長度

0.1 到 0.3 m (0.3 到 1 ft)3

高度

0.14 m (0.5 ft)

估計值

最高速度

時速約 28 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

牠有多大？

牠有多長？

牠有多高？

估計值

跟 9 塊積木排成一排一樣長小到能從椅子底下走過去能在 14 秒內飛越一整座足球場

Imparavis 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)

Imparavis 時速約 28 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

Imparavis is the earliest known toothless bird from a group called enantiornithines, or 'opposite birds'. Scientists used to think toothlessness in this group appeared only about 72 million years ago, but Imparavis pushes that back by 48 to 50 million years.2

Its name means 'odd bird' in Latin, and it was named after the famous naturalist Sir David Attenborough.1

Imparavis had a large bony crest on its upper arm bone where muscles attached. This might have let it flap its wings with extra power, similar to modern birds like puffins or quails.2

The fossil was found by an amateur collector and donated to the Shandong Tianyu Museum of Nature in China.2

Imparavis lived alongside many other early birds and dinosaurs in the Early Cretaceous period, about 120 million years ago.1 3

Unlike most other enantiornithines, which lived mainly in trees, Imparavis might have spent time on the ground foraging for food, like a modern robin.2

Imparavis 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Imparavis 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。

迷思破解王

迷思： All early birds had teeth.

真相： Imparavis shows that some early birds, like enantiornithines, lost their teeth much earlier than scientists thought. It was toothless about 120 million years ago.2

給恐龍專家

學名: Imparavis
命名者: Wang et al. 20244
類群: 早期鳥類
科 / 演化支: Enantiornithes4
分類: Theropoda > Avialae4
岩石的年代: 121 到 120 百萬年 (Aptian)4
岩層: Jiufotang4
國家: 中國4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: Imparavis was named in 2024 by Wang and colleagues. The fossil was found by an amateur collector near Toudaoyingzi village in China and later studied by scientists at the Field Museum and Shandong Tianyu Museum.1 2
仍有爭議: Scientists are still debating why Imparavis lost its teeth and what it ate, since its toothless beak and lack of a gizzard make its diet unclear.2