Dinosaur Intestines

Megazostrodon The First MammalTyrannosaurus Rex Legs

How fast was T. rex?

Most experts estimate the top speed at between 10—25 mph (16—40 km/h). Studies have shown that T. rex's legs weren't strong enough to absorb the pounding of its 6 tons of body weight at faster speeds. However, although T. rex was slower than the fastest dinosaurs (such as Ornitholestes), it was fast enough to catch potential prey, such as lumbering plant-eater Triceratops.

More Facts

■ Tyrannosaurus rex would have needed about 300 lb (136 kg) of meat each day to keep it supplied with energy.

Scavengers such as vultures and hyenas can digest meat in an advanced stage of decay without getting sick.

Some paleontologists think that T. rex may have had feathers.

How big was its bite?

| A T. rex had the biggest and the strongest jaws of any dinosaur—they could measure up to 4 ft (1.2 m) long. Experts estimate that T. rex could eat up to 500 lb (230 kg) of meat and bones in a bite. This is strong evidence that dinosaur was a hunter, for scavengers would not have needed such size or power.

Dinosaur Tetth And Jaws

Largest teeth were 9 in (23 cm) long

Hinge for opening lower jaw wide

Largest teeth were 9 in (23 cm) long

Hinge for opening lower jaw wide

Field of ■ overlap

Field of view of left eye

Field of view of right eye

Do scavengers need a strong sense of smell?

| A Scavenging animals track down dead meat by following its smell, so a sensitive nose is essential. Experiments have shown that T. rex did have a heightened sense of smell—scans of the dinosaur's skull reveal exceptionally large olfactory lobes (smell detectors). But this alone is not enough to prove that it was a scavenger. A good sense of smell is an essential tool for hunting, too.

Prominent nostrils

Fossil Rex Have Feathers

T. rex field of view

Did T. rex have good eyesight?

| A Strong vision is essential for hunting but less so for scavenging. T. rex had eyes that were angled forward, giving it some degree of binocular vision This means that it could judge the distance of an object where the fields of view from its left eye and right eye overlapped. T. rex's eyesight was probably good enough for stalking prey.

Megazostrodon

Bony ridge along back

Long, narrow jaw with sharp teeth

Did carnivores eat only meat?

Most people think of carnivorous dinosaurs sinking their teeth into a tasty plant-eater, which they certainly did. But they ate other animals, too. Recent evidence suggests that some dinosaurs preferred fish to meat, and others may have eaten both meat and plants. Fish-eating dinosaurs, such as Suchomimus, were built a little differently from their meat-eating cousins, with teeth designed for gripping their slippery prey. Dinosaur teeth provide basic information about diet, but paleontologists can discover more details from dinosaurs' fossilized droppings.

Strong legs

Suchomimus

How did a dinosaur hook a fish?

A At first, paleontologists were puzzled by Baryonyx's long, curved thumb claw. After finding fish near the dinosaur's skeleton, which suggested that it was a fish-eater, they think they know what the dinosaur did with its claw. Baryonyx probably used it to hook fish out of the water, in much the same way that bears do.

Ornitholestes Facts

Curved thumb claw

More Facts

■ Other fish-eating animals included flying reptile Dimorphodon, which swooped down from cliff-sides to snatch up fish.

■ All the four-legged dinosaurs were strict herbivores, but two-legged dinosaurs included carnivores, omnivores, and herbivores.

■ A big fish-eating dinosaur such as Suchomimus would have to eat a fish 13 ft (4 m) long to satisfy its appetite.

Like their closest living reptiles the crocodiles, dinosaurs may have eaten their own young if food was scarce.

How were fish-eaters like crocodiles?

| A The long, narrow skulls of fish-eaters were more like the heads of crocodiles than those of other dinosaurs The jaws were packed with about 100 pointed, serrated teeth. Spinosaurus may have dipped its long snout into the shallow waters of a lake or river to search for fish, then crunched them up with its many teeth.

Nostrils high on snout enabled dinosaur to breathe with its mouth in the water

Fish held firm by teeth m

Did any dinosaurs eat mammals?

Carnivores such as Syntarsus

Teeth Dinosaurs That Ate Fish

didn't prey on fellow dinosaurs. Instead, they made do with other animals. Mammals, such as the shrewlike Megazostrodon would have made a tasty snack until a more satisfying meal could be found. Many theropods would also have eaten lizards, turtles, and eggs, including those of other dinosaurs.

Dinosaurs That Ate Plants

Were there any dinosaurs that ate A both meat and plants?

Most dinosaurs were either carnivores, eating other animals, or herbivores, eating only plants, but a few were able to eat both. The name for these animals is omnivores. Omnivorous dinosaurs were small, birdlike theropods. Omnivore Gallimimus darted about the plains, picking off insects and lizards, and also munching on the vegetation.

How do we know about dinosaur diets?

| A Fossilized dinosaur droppings, known as coprolites, can reveal valuable information about dinosaur diets. Pieces of bone found in a dropping may belong to another dinosaur or other animal, undigested plant matter may contain identifiable spores or pollen. Paleontologists can even figure out the shape of a dinosaur's intestines from the shape of the coprolite.

Dinosaur Intestines
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Responses

  • Natsnet
    Which dinosur was able to eat the t rex?
    8 years ago
  • meaza bisrat
    Did trex have feathers?
    8 years ago
  • tewelde
    How big a t rex's bite?
    6 years ago
  • Michelle
    Did t rex sing to its young?
    6 years ago
  • livio
    Did dinosaurs haave intestines?
    2 years ago
  • sagramor
    How long are trex intestines?
    1 year ago

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