Question 1

How do you say Hadrosaurus?

Accepted Answer

Hadrosaurus is pronounced HAD-row-SORE-us. Break it into four parts: HAD, then row, then SORE, then us. The stress falls on the first syllable HAD, so you hit that one hardest. Say it out loud a few times and it starts to feel natural really quickly.

Question 2

What does Hadrosaurus mean?

Accepted Answer

Hadrosaurus means bulky lizard or heavy lizard. It comes from the Ancient Greek word hadros, meaning thick or heavy, combined with sauros, meaning lizard. Paleontologist Joseph Leidy chose the name in 1858 because the bones he examined were impressively large and robust. The species name foulkii honors William Parker Foulke, the man who excavated the original fossil.

Question 3

How big was Hadrosaurus?

Accepted Answer

Hadrosaurus grew to around 26 feet long, which is about as long as two full-sized pickup trucks parked end to end. It weighed roughly 3,000 kilograms, heavier than a large hippopotamus. It walked on two powerful hind legs most of the time but could also drop down onto all fours. For a plant-eater, it was a seriously large animal.

Question 4

Where was Hadrosaurus found?

Accepted Answer

The original and only confirmed Hadrosaurus foulkii fossil was found in Haddonfield, New Jersey, in 1858. It was excavated from a marl pit on the property of a local farmer named John E. Hopkins. The bones were buried in the Woodbury Formation, a rock unit that dates to roughly 80 million years ago. New Jersey is still celebrated as the home of this famous dinosaur today.

Question 5

Why is Hadrosaurus so important?

Accepted Answer

Hadrosaurus was the first nearly complete dinosaur skeleton ever found in North America, which made it hugely important to the early science of paleontology. It was also the first dinosaur skeleton ever mounted and displayed in a museum, going on public show in Philadelphia in 1868. Studying it led scientists to correctly conclude that some dinosaurs walked upright on two legs. Without Hadrosaurus, the history of dinosaur science would look very different.

Question 6

Was Hadrosaurus dangerous?

Accepted Answer

Hadrosaurus was a plant-eater, so it was not a predator and did not hunt other animals. However, a three-ton animal that stood taller than a car would not have been easy to mess with. It had no claws or horns for defense, but its sheer size offered some protection. Young or sick individuals were probably targeted by large predatory dinosaurs that lived in the same region.

Question 7

What did Hadrosaurus eat?

Accepted Answer

Hadrosaurus was a herbivore that ate plants. Its wide, flat beak was perfect for cropping leaves, twigs, and other vegetation from trees and shrubs. Inside its mouth it had a dental battery, hundreds of tightly packed teeth arranged in columns that continuously replaced themselves as old teeth wore down. This tooth system was so efficient it could grind through very tough plant material that most other dinosaurs could not handle.

Question 8

When did Hadrosaurus live?

Accepted Answer

Hadrosaurus lived during the Late Cretaceous Period, approximately 83.6 to 77.9 million years ago according to the Woodbury Formation dating. The Paleobiology Database records the genus from around 72 million years ago up to 66 million years ago. This means Hadrosaurus was alive millions of years before the mass extinction event that wiped out all non-bird dinosaurs. It shared its world with a range of other large dinosaurs, marine reptiles, and early mammals.

Question 9

Is Hadrosaurus the same as a duck-billed dinosaur?

Accepted Answer

Yes, Hadrosaurus is a duck-billed dinosaur and it is actually the animal that gave the entire group, called Hadrosauridae, its family name. All hadrosaurs, including famous ones like Parasaurolophus and Edmontosaurus, are technically named after Hadrosaurus. Its broad, flat beak does look remarkably like a giant duck's bill, which is exactly why the nickname stuck. However, Hadrosaurus itself had no head crest, unlike some of its more flamboyant relatives.

Question 10

What is New Jersey's state dinosaur?

Accepted Answer

Hadrosaurus foulkii is officially the state dinosaur of New Jersey. The state made it official in 1991, largely thanks to a campaign led by a class of elementary school students from Haddonfield. It was one of the first official state dinosaur designations in the entire United States. Given that the most famous specimen was dug up in Haddonfield, New Jersey, the honor could not have gone to a more appropriate animal.

Question 11

Did Hadrosaurus have a crest on its head?

Accepted Answer

No, Hadrosaurus did not have a crest on its head. It belongs to the subfamily Hadrosaurinae, sometimes called the flat-headed hadrosaurs, which were distinguished from their crested cousins the Lambeosaurinae. Interestingly, the original fossil did not even include a skull, so scientists had to figure this out by studying related animals and the overall shape of the skeleton. The crestless look made it look quite different from flashy relatives like Parasaurolophus.

Question 12

How was the Hadrosaurus fossil discovered?

Accepted Answer

In 1858, a fossil enthusiast named William Parker Foulke heard that a farmer in Haddonfield, New Jersey, had found some large bones in a marl pit on his property years earlier. Foulke tracked down the site, got permission to dig, and found a remarkably complete partial skeleton. He brought in Joseph Leidy, a top paleontologist from Philadelphia, who identified and formally named the animal. The story of a curious amateur teaming up with a scientist to make history is one of paleontology's best origin stories.

Question 13

Are there any Hadrosaurus fossils you can see today?

Accepted Answer

The most famous Hadrosaurus specimens are at the Academy of Natural Sciences of Drexel University in Philadelphia, Pennsylvania, the same institution that mounted the world's first public dinosaur skeleton in 1868. The original fossil bones are held in scientific collections there. New Jersey also has exhibits celebrating its state dinosaur, and the town of Haddonfield marks the original discovery site. If you are a dinosaur fan on the East Coast of the United States, these are bucket-list destinations.

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