恐龍卡第 1869 張，共 2 027 張

Utahraptor

名字的意思： “Utah plunderer”1

吃：肉迅猛龍類白堊紀早期

Utahraptor was a huge, feathered hunter that lived in what is now Utah, USA. It was the biggest member of the raptor family, much larger than the Velociraptor you see in movies. With a giant sickle claw on each foot, it was a fierce predator that could take down big plant-eaters.1 2

生存年代

137 到 133 百萬年前5

白堊紀早期

化石發現地

Dalton Wells Quarry and Gaston Quarry near Moab, Grand County, Utah, USA2

長度

5.5 到 6.1 m (18 到 20 ft)1 2

體重

350 kg (772 lb)1

高度

1.5 m (4.9 ft)2

最高速度

時速約 45 公里（28 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 18 隻狗一樣重

跟 6 隻狗從鼻子接到尾巴一樣長跟 34 根香蕉頭尾相接一樣長跟 70 顆西瓜一樣重跟 18 個幼兒園小朋友一樣重跟 11 個小學生一樣重能在 8 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Utahraptor 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)

Utahraptor 時速約 45 公里 (28 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

Utahraptor's sickle claw was 24 centimeters (9.5 inches) long, perfect for slashing at prey.2

It lived during the Early Cretaceous period, about 139 to 135 million years ago, making it one of the oldest known dromaeosaurs.1 2

Utahraptor was the inspiration for the Velociraptors in the movie Jurassic Park, even though real Velociraptor was much smaller.2

In 2018, Utahraptor became the official state dinosaur of Utah after a 10-year-old student asked the state senate.1

Scientists think Utahraptor was not very fast and may have ambushed its prey, using its bulk and claws.1

Although no direct fossils of feathers have been found, scientists believe Utahraptor almost certainly had feathers, like other dromaeosaurs.1

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

?How big was Utahraptor?

Utahraptor was about 6 to 7 metres (20 to 23 feet) long and weighed around 500 kilograms (1,100 pounds), about the size of a polar bear.3 1

?Did Utahraptor have feathers?

Yes, scientists believe Utahraptor almost certainly had feathers, because other dromaeosaurs had them, even though no direct feather fossils have been found yet.3 1

?What did Utahraptor eat?

Utahraptor was a carnivore that ate other animals, including large plant-eating dinosaurs like iguanodonts and ankylosaurs.3 1

?How fast could Utahraptor run?

Utahraptor was not very fast. It was an ambush hunter that used its bulk and claws to surprise prey, not speed.3 1

?Was Utahraptor bigger than Velociraptor?

Yes, Utahraptor was much bigger than Velociraptor. It was the largest known member of the raptor family, while Velociraptor was only about the size of a turkey.3 1

?When did Utahraptor live?

Utahraptor lived during the Early Cretaceous period, about 139 to 135 million years ago.3 1

?Where was Utahraptor found?

All known Utahraptor fossils come from Utah in the United States, especially from the Cedar Mountain Formation near Arches National Park.3 1

?How long was Utahraptor's claw?

Utahraptor's sickle claw on its second toe was about 24 centimetres (9.4 inches) long.3 1

?Did Utahraptor hunt in packs?

Scientists think Utahraptor may have been social and hunted in groups, because fossils of several individuals of different ages have been found together.3 4

?Is Utahraptor the state dinosaur of Utah?

Yes, Utahraptor became the official state dinosaur of Utah in 2018 after a 10-year-old student petitioned the state senate.3 1

迷思破解王

迷思： Utahraptor was a fast runner like smaller raptors.

真相： Utahraptor was heavy and bulky, and scientists think it was not very fast. It probably used ambush hunting instead of chasing prey.1

給恐龍專家

學名: Utahraptor
命名者: Kirkland et al. 19935
類群: 迅猛龍類
科 / 演化支: Dromaeosauridae5
分類: Theropoda > Dromaeosauridae5
岩石的年代: 137 到 133 百萬年 (Valanginian)5
岩層: Cedar Mountain5
國家: 美國5
化石紀錄: The Paleobiology Database 收錄 4 筆5
發現: The first Utahraptor fossils were found by Jim Jensen in 1975, but the dinosaur was not studied until 1991 when James Kirkland, Robert Gaston and Donald Burge found more remains. It was named in 1993.1
仍有爭議: Scientists are not sure if Utahraptor had feathers, because no direct feather fossils have been found, but most think it did.1