But new research points the finger more squarely at us. A paper published last month in eLife which uses genetic analysis from museum specimens to reconstruct great auk population trends, suggests “there was no reason for them to go extinct if they hadn’t been hunted,” said Jessica Thomas, a scientific officer at Swansea University in Wales and the lead author of the study. This puts great auks in the same doomed-by-humans category as the passenger pigeon and the moa.

While there are limits to how much you can learn about historic population changes from genetic data, the paper shows “how this type of reconstruction might be applied to better understand other species conservation problems,” said Tim Wootton, an ecology and evolution professor at the University of Chicago who was not involved in the research.

Humans have been hunting great auks for millenniums. But starting around the 15th century, they became a staple for sailors traveling near the American and European coasts. Crews ate their eggs, brought them onboard as mobile food sources and plucked out their feathers to sell to pillow-makers. They even burned their oil-rich bodies for fuel.

The birds were gone before we could learn very much about them. Naturalists never got a chance to study them in the wild. Even basic information, like the extent of their breeding season or the sound of their calls wasn’t well-documented, Dr. Thomas said.

The researchers needed a different way to look into the species’ history. So they compared DNA from 41 different great auks, including the two endlings killed in Iceland. They were looking for evidence of species-level vulnerabilities: a shrinking gene pool, for example, or signs that the overall population was fragmenting into smaller groups.