A documentary film, “Penguin Counters” by Harriet and Peter Getzels of Chevy Chase, will have its Washington, D.C., premiere Saturday at the 23rd annual Environmental Film Festival in the Nation’s Capital.

The film, presented with the Antarctic and Southern Ocean Coalition and the Pew Charitable Trusts, profiles the work of Ron Naveen of Washington with penguins in Antarctica. It depicts penguins as canaries in the coal mine of climate change, according to a news release.

Naveen and other biologists have tracked 200 colonies of penguins over half a million square miles for more than 20 years.

The Getzels, whose studio is in Bethesda, lived in the Andes Mountains and Amazon region for six years before moving to the U.K. and working for the BBC around the world. They moved to Washington in 2001 to work for National Geographic and learned that Peter Getzel’s first cousin Ellen Luria is Naveen’s wife. Their film sprang from that relationship.

“Penguin Counters” will be shown at 4 p.m. the National Museum of Natural History. Other films in the festival will be shown at the AFI Silver Theatre in Silver Spring and Writer’s Center in Bethesda. The complete schedule is at dceff.org.