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Zoo's Animal X-Rays Reveal Spooky, Scary Skeletons

The Oregon Zoo recently posted a series of tweets that included incredible animal X-rays, showcasing the beauty of the zoo's animals on the inside.

From the wings of a flying fox, to a toucan's skull, to the spindly legs of a flamingo, animals' incredible skeletal adaptations are pictured in eerie black and white, offering a Halloween-worthy peek at the bones under layers of skin, muscle and fat. [See X-ray images of the Oregon Zoo animals]

Some of the images show the skeletons in their entirety. Inside the undulating body of a ball python (Python regius), a lengthy chain of vertebrae is framed by ribs running almost the entire length of its sinuous form. Meanwhile, a Rodrigues flying fox (Pteropus rodricensis) lifts its wings overhead, revealing the elongated finger bones inside them.

Other images zoom in for a closer look at animals' exceptional adaptations. In a beaver's broad, flat tail, a line of vertebrae extends almost to the tail's tip, with the individual bones growing ever-smaller as they progress away from the pelvis. An X-ray of the skull of a Cape porcupine (Hystrix africaeaustralis) reveals the heft of its molars and a dramatic curve to its powerful incisors.

Inside this hedgehog, a dark blob near its ribcage is a tiny ball of gas. (Image credit: Oregon Zoo)

To get these extraordinary images, the veterinary staff turned to digital radiography, a type of X-ray imaging that uses digital image-capture technology instead of printing images to film. Digital radiology enables veterinarians and technicians to adjust the exposure in their images after taking them; this means that image capture can happen more quickly, and the animals can spend less time under anesthesia, zoo representatives wrote in a blog post.

The process also allows veterinarians to create a digital archive and easily share X-rays with animal caregivers at other zoos, according to the post. But perhaps most important, digital X-rays provide detailed, high-resolution images, "which helps ensure excellent health care for the animals," zoo representatives said in a statement.

"It also provides a unique glimpse inside the world of wildlife," they added.

Originally publishedon Live Science.

Mindy Weisberger
Mindy Weisberger is a senior writer for Live Science covering general science topics, especially those relating to brains, bodies, and behaviors in humans and other animals — living and extinct. Mindy studied filmmaking at Columbia University; her videos about dinosaurs, biodiversity, human origins, evolution, and astrophysics appear in the American Museum of Natural History, on YouTube, and in museums and science centers worldwide. Follow Mindy on Twitter.