恐龍卡第 1324 張，共 2 027 張

Ornitholestes

名字的意思： “bird robber”1

吃：肉肉食恐龍侏羅紀晚期到白堊紀早期

Ornitholestes was a small, fast dinosaur that lived about 154 million years ago. It had long fingers with claws to grab quick prey like lizards and early mammals. Its name means 'bird robber', but scientists think it probably didn't eat many birds.1 2

生存年代

158 到 143 百萬年前4

侏羅紀晚期到白堊紀早期

化石發現地

Wyoming, USA, and possibly Colorado1 4

長度

2 到 2.22 m (6.6 到 7.3 ft)1

體重

12.6 kg 到 15 kg (28 到 33 lb)1

高度

0.7 m (2.3 ft)3

最高速度

時速約 40 公里（25 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？

牠有多長？

牠有多高？

牠有多重？

跟 4 隻家貓一樣重

跟 4 隻家貓從鼻子接到尾巴一樣長跟 12 根香蕉頭尾相接一樣長跟 120 根香蕉一樣重能在 9 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Ornitholestes 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)

Ornitholestes 時速約 40 公里 (25 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

Ornitholestes had big eyes, which were more than one quarter of the length of its skull. This might have helped it see at night.1

Its tail was very long and whiplike, making up more than half of its body length. The tail helped it balance while running.1

The front teeth of Ornitholestes were cone-shaped and not very serrated, but the back teeth were curved and had sharp serrations like steak knives.1

Only one nearly complete skeleton of Ornitholestes has been found. It was discovered in Wyoming in 1900 by a team from the American Museum of Natural History.1

Some scientists once thought Ornitholestes was the same dinosaur as Coelurus, but most now agree they are different genera.1 2

An early drawing by Charles R. Knight showed Ornitholestes chasing the bird Archaeopteryx, but scientists today think it mostly ate ground animals.1

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

?How big was Ornitholestes?

About 2 metres (6.6 feet) long and weighed around 12.6 kilograms (27.8 pounds).1 2

?What did Ornitholestes eat?

It ate small, speedy animals like lizards, early mammals, and maybe baby dinosaurs. Some scientists think it might have also caught fish or an occasional bird.1 2

?Could Ornitholestes fly?

No, Ornitholestes was a dinosaur that walked and ran on two legs. It could not fly.1 2

?Was Ornitholestes a dinosaur?

Yes, Ornitholestes was a small meat-eating theropod dinosaur.1 2

?When did Ornitholestes live?

It lived during the Late Jurassic Period, about 154 million years ago.1 2

?Where was Ornitholestes found?

A nearly complete skeleton was found in Wyoming, USA, in 1900.1 2

?How fast could Ornitholestes run?

Scientists do not know its exact speed, but it had strong running muscles and a long tail for balance, so it was probably fast.1 2

?Did Ornitholestes have feathers?

No fossil feathers have been found with Ornitholestes, but since it was a close relative of feathered dinosaurs, some scientists think it might have had simple feathers.1

迷思破解王

迷思： Ornitholestes mainly ate birds.

真相： Its name means 'bird robber', but scientists now think it mostly ate small land animals like lizards, mammals, and baby dinosaurs. It may have also eaten fish.1

給恐龍專家

學名: Ornitholestes
命名者: Osborn 19034
類群: 肉食恐龍
科 / 演化支: Compsognathidae4
分類: Theropoda > Compsognathidae4
岩石的年代: 158 到 143 百萬年 ()4
岩層: Morrison4
國家: 美國4
化石紀錄: The Paleobiology Database 收錄 4 筆4
發現: Ornitholestes was named by Henry Fairfield Osborn in 1903. The skeleton was dug up in July 1900 in Wyoming by a team from the American Museum of Natural History.1
仍有爭議: Scientists are not sure if Ornitholestes hunted at night. One researcher suggested its big eyes were for night vision, but there is no proof yet.1