恐龍卡第 1369 張，共 2 027 張

Parahesperornis

名字的意思： “near Hesperornis”1

吃：肉早期鳥類白堊紀晚期

Parahesperornis was a flightless bird that lived in the sea. It swam like a penguin and had teeth in its beak. It lived during the time of dinosaurs, about 85 to 82 million years ago.1 4

生存年代

90 到 84 百萬年前4

白堊紀晚期

化石發現地

Kansas, USA4 1

長度

0.6 到 0.9 m (2 到 3 ft)2

高度

0.41 m (1.3 ft)

估計值

最高速度

時速約 9 公里（6 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

跟 2 隻家貓從鼻子接到尾巴一樣長跟 5 根香蕉頭尾相接一樣長小到能從椅子底下走過去能在 20 秒內游完一座大泳池（50 公尺）

Parahesperornis 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)

Parahesperornis 時速約 9 公里 (6 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

Parahesperornis could not fly. Its wings were tiny and useless for flying, but its legs were strong for swimming.1 2

It had sharp teeth in its beak, which is unusual for modern birds. These teeth helped it grab slippery fish.1 2

Parahesperornis is known from two nearly complete skeletons, which is rare for ancient birds. Most are found as just a few bones.2

It lived in the Western Interior Seaway, a shallow sea that covered central North America during the Cretaceous.1

The first fossil of Parahesperornis was found in 1894, but it was not named until 1984 by scientist L. D. Martin.2 4

Parahesperornis was about the size of a modern loon or a small penguin, around 60 to 90 centimeters long.2

Parahesperornis 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Parahesperornis 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 Parahesperornis 最常被問的問題

?Was Parahesperornis a dinosaur?

Yes, it was a type of prehistoric bird. While birds are descendants of dinosaurs, scientists classify Parahesperornis as an avialan bird rather than a dinosaur.1

?How big was Parahesperornis?

It was about 60 to 90 centimetres (2 to 3 feet) long, roughly the size of a modern loon or a small penguin.1

?Did Parahesperornis have teeth?

Yes, it had sharp teeth in its beak, which helped it grab slippery fish.2

?Could Parahesperornis swim?

Yes, it was a foot-propelled diving bird that swam like a penguin, using its strong legs to chase fish underwater.3

迷思破解王

迷思： Some people think Parahesperornis was a dinosaur.

真相： Parahesperornis was a bird, not a dinosaur. Birds evolved from dinosaurs, but Parahesperornis is classified as an avialan, which is a group that includes modern birds and their extinct relatives.1 4

給恐龍專家

學名: Parahesperornis
命名者: Martin 19844
類群: 早期鳥類
科 / 演化支: Hesperornithidae4
分類: Theropoda > Avialae4
岩石的年代: 90 到 84 百萬年 (Coniacian / Santonian)4
岩層: Niobrara4
國家: 美國4
化石紀錄: The Paleobiology Database 收錄 3 筆4
發現: The first fossil of Parahesperornis alexi was found in 1894 by H. T. Martin in Graham County, Kansas. It was later named by L. D. Martin in 1984.2 4
仍有爭議: Scientists are not sure if some fossils from Mongolia belong to Parahesperornis or a different, similar bird.1