恐龍卡第 0799 張，共 2 027 張

Hesperonychus

名字的意思： “western claw”1

吃：肉迅猛龍類白堊紀晚期

Hesperonychus was a tiny, feathered dinosaur that lived in what is now Canada. It was one of the smallest meat-eating dinosaurs ever found in North America, about the size of a chicken.1

生存年代

84 到 72 百萬年前4

白堊紀晚期

化石發現地

Alberta, Canada, in the Dinosaur Park Formation and Oldman Formation1 2

長度

1 m (3.3 ft)3

體重

1.9 kg (4 lb)1

高度

0.39 m (1.3 ft)

估計值

最高速度

時速約 24 公里（15 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？

估計值

牠有多重？

跟 16 根香蕉一樣重

跟 2 隻家貓從鼻子接到尾巴一樣長跟 6 根香蕉頭尾相接一樣長比一隻家貓還輕跟 16 根香蕉一樣重小到能從椅子底下走過去能在 15 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Hesperonychus 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)

Hesperonychus 時速約 24 公里 (15 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

Hesperonychus weighed only about 1.9 kilograms, which is less than a house cat.1

It is the smallest carnivorous non-avian dinosaur known from North America.1

Hesperonychus belongs to a group called Microraptorinae, which includes the four-winged Microraptor from China.1

Its fossils were first collected in 1982 but were not studied until 25 years later.1

Hesperonychus lived about 75 million years ago during the Late Cretaceous.1

Even though it was fully grown, its hip bones were fused together, showing it was an adult.1

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

?How big was Hesperonychus?

About 1 metre long and weighed between 1.5 and 2 kilograms, roughly the size of a large cat.3 1

?What did Hesperonychus eat?

It was a meat-eater. It ate small animals like lizards, mammals, and insects.3 1

?Did Hesperonychus have feathers?

Yes, it almost certainly had feathers. It belonged to a group of feathered dinosaurs called Microraptorinae, which includes the four-winged Microraptor.3 1

?Could Hesperonychus fly?

Probably not. Scientists think it was more like a ground-running predator, not a glider like its relative Microraptor.3

?When did Hesperonychus live?

It lived about 75 million years ago, during the Late Cretaceous period.3 1

?Is Hesperonychus a dinosaur?

Yes, it is a small, meat-eating dinosaur called a dromaeosaurid. It is not a bird, even though it had feathers.3 1

給恐龍專家

學名: Hesperonychus
命名者: Longrich and Currie 20094
類群: 迅猛龍類
科 / 演化支: Dromaeosauridae4
分類: Theropoda > Dromaeosauridae4
岩石的年代: 84 到 72 百萬年 (Campanian)4
岩層: Dinosaur Park, Oldman4
國家: 加拿大4
化石紀錄: The Paleobiology Database 收錄 4 筆4
發現: The holotype was collected in 1982 by Dr. Elizabeth Nicholls, but it was not described until 2009 by Nicholas Longrich and Philip Currie. The species name honors Elizabeth Nicholls.1 3
仍有爭議: Scientists are not sure exactly how many small dromaeosaurids lived in North America, because only isolated bones have been found so far.1