恐龍卡第 1463 張，共 2 027 張

Potamornis

名字的意思： “river bird”3

吃：肉早期鳥類白堊紀晚期

Potamornis was a small, toothed bird that lived near the end of the Age of Dinosaurs. It hunted along the shores of a river in what is now Wyoming, USA. It was a fast, meat-eating bird that could probably run and maybe fly a little.3

生存年代

72 到 66 百萬年前3

白堊紀晚期

化石發現地

Wyoming, USA, in the Lance Formation3 1

長度

0.1 到 0.5 m (0.3 到 1.6 ft)1

體重

1.5 kg 到 2 kg (3 到 4 lb)2

高度

0.23 m (0.8 ft)

估計值

最高速度

時速約 8 公里（5 英里）

游泳, 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

牠有多重？

跟 17 根香蕉一樣重

跟 3 根香蕉頭尾相接一樣長大約跟一隻家貓一樣重跟 17 根香蕉一樣重跟 16 塊積木排成一排一樣長小到能從椅子底下走過去能在 22 秒內游完一座大泳池（50 公尺）

Potamornis 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)

Potamornis 時速約 8 公里 (5 mph)

騎腳踏車的小朋友 時速約 12 公里 (7 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

Potamornis is known from just one partial skull bone, called a quadrate, which was found in Wyoming.3

It lived about 72 to 66 million years ago, right before the big extinction that killed the non-bird dinosaurs.1

Potamornis belonged to a group of ancient birds called Hesperornithiformes, which were mostly diving birds with teeth.3

The name Potamornis means 'river bird', because it was found in rocks that were once a riverbed.3

Scientists think Potamornis was a ground-dwelling bird that could run fast on land.3

It laid eggs, like all birds do, and probably built nests on the ground.1

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

你們都在問

關於 Potamornis 最常被問的問題

?How big was Potamornis?

It was a small bird, weighing perhaps 1.5 or 2 kilograms (3.3 to 4.4 pounds).2

?Did Potamornis have teeth?

Yes, it was a toothed bird. It belonged to a group of ancient birds called Hesperornithiformes, which had teeth.2

?Could Potamornis fly?

Probably not. It was a flightless diving bird, like other members of its group, though some scientists think it might have been able to fly a little.2

?What did Potamornis eat?

It was a meat-eater (carnivore). It likely hunted for fish and other small animals in the water.3

迷思破解王

迷思： Some people think Potamornis was a dinosaur like T. rex.

真相： Potamornis was a bird, and while birds are dinosaurs, it was a small, feathered, flying or running bird, not a big predator.3

給恐龍專家

學名: Potamornis
命名者: Elzanowski et al. 20013
類群: 早期鳥類
科 / 演化支: Hesperornithiformes3
分類: Theropoda > Avialae3
岩石的年代: 72 到 66 百萬年 (Maastrichtian)3
岩層: Lance3
國家: 美國3
化石紀錄: The Paleobiology Database 收錄 1 筆3
發現: Potamornis was named by Elzanowski, Paul, and Stidham in 2001, based on a skull bone found in the Lance Formation of Wyoming.3
仍有爭議: Scientists are still not sure exactly how Potamornis is related to other ancient birds, because only a single skull bone has been found.3