恐龍卡第 1711 張，共 2 027 張

Stenonychosaurus

名字的意思： “narrow claw lizard”1

Stenonychosaurus was a small, speedy dinosaur that lived in Canada about 77 to 74 million years ago. It had big eyes, a big brain, and sharp claws, so it was probably a smart hunter.1 2

生存年代

84 到 66 百萬年前4

白堊紀晚期

化石發現地

Alberta, Canada, and possibly Montana, USA1 2

長度

最多 2.5 m (8.2 ft)1

體重

最多 35 kg (77 lb)1

高度

0.9 m (3 ft)3

最高速度

時速約 48 公里（30 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 9 隻家貓一樣重

跟 2.5 隻狗從鼻子接到尾巴一樣長跟 14 根香蕉頭尾相接一樣長跟 7 顆西瓜一樣重能在 7.5 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Stenonychosaurus 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)

Stenonychosaurus 時速約 48 公里 (30 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

Stenonychosaurus had very long, slender legs, so it could run fast.1

It had a large, sickle-shaped claw on each second toe that it held off the ground when running.1

Its eyes faced forward, giving it good binocular vision, which helps with judging distance when hunting.1

The teeth of Stenonychosaurus had large serrations with pits at the intersections, and the points pointed toward the tip of the tooth.1

Some scientists think it might have eaten plants because its jaws met in a broad U-shape, similar to an iguana.1

It lived in a warm coastal floodplain with forests, alongside big predators like Daspletosaurus and Gorgosaurus.1

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

?How big was Stenonychosaurus?

Stenonychosaurus was a small dinosaur, up to 2.5 metres long and 35 kilograms in body mass. The largest specimens were about the size of Deinonychus and Unenlagia.1 2

?What did Stenonychosaurus eat?

Scientists think it was probably an omnivore, eating both meat and plants. Its teeth had large serrations and its jaws met in a broad U-shape, similar to an iguana, which suggests it could bite through tough plant material.1 2

?Was Stenonychosaurus smart?

Yes, it had one of the largest brains of any dinosaur relative to its body size, comparable to modern birds. It was probably cleverer than most dinosaurs, but not as smart as a human or a crow.1 2

?Could Stenonychosaurus run fast?

Yes, it had very long, slender hind limbs, which suggests it could run quickly. It also held its sickle-shaped claws off the ground when running.1 2

?When did Stenonychosaurus live?

It lived during the Late Cretaceous period, about 77 to 74 million years ago, in what is now Canada.2

?Is Stenonychosaurus a dinosaur?

Yes, it is a small theropod dinosaur, specifically a troodontid. Troodontids are a group of bird-like dinosaurs, not birds themselves.1 2

?Did Stenonychosaurus have feathers?

The sources do not mention feathers on Stenonychosaurus. However, it is closely related to birds and other feathered dinosaurs, but we don't have direct evidence from the fossils described.1

?Why did Stenonychosaurus have big eyes?

Its eyes were very large and slightly forward facing, giving it good depth perception. This might have helped it hunt, and some scientists think it may have been partially nocturnal.1

迷思破解王

迷思： Stenonychosaurus was a fierce meat-eater like other raptors.

真相： Its teeth and jaws look more like those of plant-eaters, so scientists now think it may have eaten both meat and plants.1 2

給恐龍專家

學名: Stenonychosaurus
命名者: Sternberg 19324
類群: 迅猛龍類
科 / 演化支: Troodontidae4
分類: Theropoda > Troodontidae4
岩石的年代: 84 到 66 百萬年 (Campanian / Maastrichtian)4
岩層: Dinosaur Park, Oldman, Lance4
國家: 加拿大, 美國4
化石紀錄: The Paleobiology Database 收錄 14 筆4
發現: Charles Mortram Sternberg named Stenonychosaurus in 1932, based on a foot, hand fragments, and some tail bones from Alberta, Canada.1
仍有爭議: Scientists still debate whether Stenonychosaurus is a separate genus from Troodon, and whether it was a strict predator or an omnivore.1 2