TRAVERSE CITY, MI - And then there were two.

An image of Piper, the bird-chasing border collie who works to keep the runways clear at the Cherry Capital Airport, has made it to the final round of the U.S. Coast Guard's 2016 #ShutterShootout competition.

The online contest is for Coast Guard Photo of the Year. The voting brackets are a little like basketball's March Madness. So far, Piper's photo has made it past the Sweet 16, Elite 8 and Final Four rounds.

To cast your vote on the Coast Guard's Facebook page, click on the picture of your choice, then "like" the photo.

Piper's image shows him in his element, flanked by choppers from the Coast Guard's Traverse City Air Station and the Royal Canadian Air Force. It was snapped during a joint training day last fall.

Piper the bird-chasing border collie, flanked by choppers from the U.S. Coast Guard and Royal Canadian Air Force (Photo courtesy of airportk9.org)

While he's been an in-state celebrity for more than a year while keeping the Up North runways safe, Piper became a social media darling via Reddit in late February.

An animated gif of the dog coolly glancing at a rescue chopper stirring up clouds of snow, was "upvoted" by 97 percent of Reddit viewers, hitting the top of the gif section of the website and receiving some 7,300 points.

Last week, Piper celebrated his 8th birthday by welcoming home the U.S. Coast Guard Air Station Traverse City's new search-and-rescue helicopter, which was painted in a retro design to celebrate 100 years of the military branch's aviation sector.