The battle over now-famous selfie photographs taken by a macaque monkey will head back to federal court.

The U.S. Court of Appeals for the Ninth Circuit in San Francisco on Wednesday will hear arguments on whether an animal can own the copyright to a photograph. The proceedings will be broadcast online .

A federal judge last year ruled that the monkey cannot be declared the photos’ copyright owner, saying that while Congress and the president can extend the protection of law to animals as well as humans, there is no indication that they did so in the Copyright Act.

The lawsuit filed in 2015 by People for the Ethical Treatment of Animals sought a court order allowing PETA to administer all proceeds from the photos for the benefit of the monkey, which it identified as Naruto, a free-living crested macaque from Indonesia.

PETA says Naruto has been accustomed to cameras throughout his life and took the selfies when he saw himself in the reflection of the lens. The animal rights organizations says the monkey drew the connection between pressing the shutter release and the change in his reflection, and made different facial expressions while pressing the shutter release.

The photos of the monkey of a toothy grin were taken in 2011 in Sulawesi, Indonesia with an unattended camera owned by British nature photographer David Slater.

Slater says the British copyright obtained for the photos by his company, Wildlife Personalities Ltd., should be honored worldwide.