Scientists discover amphibious dinosaur so weird, they thought it was fake

Thanks to a team of European paleontologists, the Velociraptor just got a new, extremely awkward cousin: the Halszkaraptor. Their study, is based on a fossil that had been smuggled out of Mongolia and found its way into the hands of a Belgian paleontologist named Pascal Godefroit.

Only a portion of the creature was visible from outside the hunk of rock, but even that was enough to tell this was a dinosaur unlike any we’ve seen before, an amphibious half-raptor, half-swan predator so bizarre that the scientists thought it could have been fake.

Halszkaraptor, which shows that not all dromaeosaurid raptors were knife-toed murderbirds.

“It was so strange that we suspected that it might have been a chimera—a mix of different skeletons glued together. It wouldn’t be the first time,” Andrea Cau, one of the authors of the study, said “We had to be sure that it was a real dinosaur and not a fake.”

To do that, the team used a particle accelerator to scan the rock housing the fossil. They determined it was the real deal and named the monstrosity Halszkaraptor escuilliei, after Halszka Osmólska, a Polish paleontologist, and François Escuillié, the French collector who had bought the fossil and got it to Godefroit.

New dinosaur Halszkaraptor has a mash-up of traits that need to be seen to be believed…but it’s the animal’s lifestyle that’s really intriguing.

The study concludes that this is the first amphibious dinosaur we know of, with its swan-like neck, duck bill, and not-quite-flipper arms probably making it a great swimmer capable of chasing down fish and plucking them out of the water. The rest of its body, meanwhile, was kind of a mess, with long legs that weren’t particularly good for running and a long tail that wasn’t heavy enough to counterbalance its ridiculous neck.

“It is a stunning fossil,” said Stephen Brusatte, a palaeontologist at the University of Edinburgh who was not involved in the study. But, he said, despite the careful analysis by the authors, he has concerns.

“I just have some nagging doubts about whether the whole thing is one genuine skeleton,” he said, adding that while it is easy to spot a bad fake, modern tampering can be highly sophisticated. “The thing that piques my curiosity is that the body really looks like a dromaeosaur, a raptor dinosaur, and the head really looks like an alvarezsaur – that’s another type of small dinosaur.”

It likely turned out this way by adapting to an “unstable environment” that cycled between droughts and abundant water. The one thing the researchers can’t quite nail down is how Halszkaraptor’s arms functioned. Although the bones resemble those of modern swimming birds like penguins, Cau says they don’t have enough information about the skeleton to determine if halszkaraptor swam like one.