ANCHORAGE, Alaska (AP) — It’s not America’s Top 40, but it’s a cutting edge song.

Federal marine biologists for the first time have recorded singing by one of the rarest whales on the planet, the North Pacific right whale.

National Oceanic and Atmospheric Administration researchers used moored acoustic recorders to capture repeated patterns of calls made by male North Pacific right whales.

It’s the first time right whale songs in any population have been documented, said NOAA Fisheries marine biologist Jessica Crance on Wednesday from Seattle. She spoke to southern right whale and North Atlantic right whale experts to confirm that singing had not previously been documented.

Researchers detected four distinct songs over eight years at five locations in the Bering Sea off Alaska’s southwest

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