WATCH: Is it a bird or a bunny? World Bird Sanctuary of St. Louis video goes viral.

The 2017 video resurfaced when it was shared by Daniel Quintana, a senior researcher at Norway's University of Oslo.

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August 23, 2019 - 4:17 am

Paige Davis/World Bird Sanctuary

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(1010 WINS) -- Remember the viral debate in 2015 over whether a dress was blue or gold?

Well, another similar optical illusion brouhaha has emerged. But this time, it's whether a bird or a bunny is in a video posted by Daniel Quintana, a senior researcher at Norway's University of Oslo.

“Rabbits love getting stroked on their nose,” he tweeted, along with the video.

Then, he discovered the source of the bird-or-bunny illusion video: Paige Davis of World Bird Sanctuary of St. Louis!

Currently -- #mischieftheraven #whiteneckedraven #raven

A post shared by Paige Davis (@pythonpaige) on

He later told CNET, "I thought it was fairly clear that the video was of a bird."

“As you can see the translucent nictitating membrane sweep across the eye horizontally (rabbits don’t have membranes like this) and the positioning of the ‘ears’ are a little strange,” he said.

“I made the rabbit comment to prime readers into thinking it was actually a rabbit, to give it a fighting chance at least. When you only see the beak in your peripheral vision, it really seems like they’re ears. Without this misleading cue, I thought most people would have seen a bird.”

The idea was based off “the static bird/rabbit illusion” created by psychologist Joseph Jastrow in 1899  to prove the power of suggestion, Quintana said. 

“The static bird/rabbit illusion is well-known within psychology and philosophy, so when I saw [the Imgur> video, I thought it would interesting to share it," Quintana said.

So, is it a bird or a rabbit?

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