Millions upon millions of red crabs on Australia's Christmas Island are shutting down roads, covering beaches and stopping people in their tracks.
But to the locals who live there, coming across a sea of red crabs heading for the coast at the end of November is nothing out of the ordinary.
According to the Australian National Parks department's latest surveys, around 45 million red crabs, made up of 14 different species, live on the tiny island, located roughly 500 miles off the coast of Indonesia.
Each year, adult red crabs, which can also look orange or, rarely, purple in color, migrate from the island's lush forests to the Indian Ocean for breeding.
Christmas Island National Park Chief Ranger Rob Muller snapped these photos early Thursday morning.