恐龍卡第 0944 張，共 2 027 張

Kaririavis

名字的意思： “Kariri bird, named after the Karirí people of northeastern Brazil”1

吃：肉早期鳥類白堊紀早期

Kaririavis was a tiny, sparrow-sized bird that lived about 115 million years ago in what is now Brazil. It is one of the oldest known birds of its group from the southern continents. Scientists know it from just one fossil foot, but that foot tells a big story!1 2

生存年代

120 到 113 百萬年前4

白堊紀早期

化石發現地

Pedra Branca Mine, Nova Olinda County, Ceará State, Brazil1

最高速度

時速約 27 公里（17 英里）

飛行, 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)

Kaririavis 時速約 27 公里 (17 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

Kaririavis is the oldest known ornithuromorph bird from Gondwana, the ancient southern supercontinent.1 2

Its name honors the Karirí people, an indigenous group from northeastern Brazil.1

The fossil is just a single foot, but it includes at least 10 preserved contour feathers, which are the feathers that cover a bird's body.1

Kaririavis had a very large, hooked claw on its second toe, which was about one third the length of its foot bone.1

Unlike many early birds that lived near water, Kaririavis's foot shape suggests it may have spent most of its time on the ground.1

The fossil was found in the Crato Formation, a famous fossil site in Brazil known for preserving soft tissues like feathers.1

Kaririavis 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Kaririavis 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。

給恐龍專家

學名: Kaririavis
命名者: Carvalho et al. 20214
類群: 早期鳥類
科 / 演化支: Ornithuromorpha4
分類: Theropoda > Avialae4
岩石的年代: 120 到 113 百萬年 (Aptian)4
岩層: Crato4
國家: 巴西4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: Kaririavis was named by Carvalho and colleagues in 2021, based on a fossil foot found at Pedra Branca Mine in Brazil. The species name 'mater' means 'mother' in Latin, because it is the oldest ornithuromorph from South America.1 3
仍有爭議: Scientists are not sure whether Kaririavis lived on the ground or in the trees, because its foot has a mix of features that point to different lifestyles.1