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As far as scientists know, pterodactyls were the largest flying animals that ever lived. Some pterodactyls measured more than 36 feet (11 meters) across with the wings spread out. But the smallest pterodactyls were as small as a sparrow. A pterodactyl's back legs were long and thin, like those of birds.

Pterodatylus was a kind of Pterosaur.
Pterosaurs are flying reptiles; Pterodactyls weren't a dinosaur. They lived during the late Jurassic Period and were a relatively small pterosaur with a wingspan of just over 1 meter.

More characteristics:
-Carnivore and their diet was based mainly on fish.
-They had quite long wings that allowed them to fly without spending energy.
-They had a crest on their skull.

Did pterodactyls have feathers?
Contrary to what many people think, pterodactyls didn't have feathers. These aren't the direct ancestors of birds, but other smaller species that also lived in the Jurassic and Cretaceous and did have feathers. Pterodactyls are just reptiles that could fly.

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Mosasaurus is a genus of large aquatic carnivorous lizard from the Late Cretaceous about 70-66 million years ago. Mosasaurus gave its name to a group of marine lizards - Mosasaurs.

it fed on cephalopods, fish and marine reptiles. Mosasaurus was not selective when hunting, it simply lurked in the depths and then came up quickly with its jaws wide open and then closed when it caught something.

Mosasaurus means 'Meuse Lizard', referring to the river near which it was first found. It fed on such prey as seabirds, sharks, large fish, plesiosaurs and even other mosasaurs.

The Mosasaurus was a carnivore dinosaur and he weigh 20 tons and mesuared 13-15 meters.

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Measures:
- Long: 17 - 18 meters
- Height: 7 - 8 meters

Food:
- Fish

Family:
- Theropods, Saurischia

Habitat:
- Semi-aquatic

Facts:
Spinosaurus (meaning "spine lizard") is a genus of spinosaurid dinosaurs that lived in what now is North Africa during the Cenomanian to upper Turonian stages of the Late Cretaceous period, about 99 to 93.5 million years ago.

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He lived in what is now Argentina during the Upper Cretaceous.

The Argentinosaurus head was quite small for its size, accounting for only 1% of body weight

its neck was very long, and it was composed of 13 vertebrae that together reached 8 meters in length

recently it was concluded that it was about 31 meters tall and weighed about 64 tons.

he must have had a huge heart, weighing more than 300 kg to send blood throughout his body, from the head to the tip of The tail.

If it was cold-blooded, the Argentinosaurus would have to eat half a ton of plants a day

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Describe its size: It is a small dinosaur, the adults barely reached a length of 1.8m and approximately 0.5 meters high at the hip, weighing 15kg.

Diet:The Velociraptor fed mainly on herbivorous dinosaurs such as Hadrosaurus, Protoceratops, and Saurolophus, as well as the eggs of other species and small mammals.

Habit and when it lived:The velociraptor lived during the Campaniaense, towards the end of the Cretaceous period, about 75 to 71 million years ago, in what is now Asia.

More characteristics:
The Velociraptor's most impressive feature was the curved claw on each foot.
His growl is the result of a mixture of dolphins and turtles