Bob Yirka, writing at Phys.org:
Three researchers from the University of Oxford and the South Iceland Nature Research Centre have found evidence of tool use by puffins—the first evidence of tool use by any seabird. In their paper published in Proceedings of the National Academy of Sciences, Annette Fayet, Erpur Snær Hansen and Dora Biro describe their evidence of puffins using sticks to scratch a part of their body.
The researchers note that the bird in their recording lived on Grimsey Island in Iceland, where birds suffer from parasites in their plumage. They further note that last year was known to be a particularly bad year for tick infestations. They suggest using a sharp stick might have been more effective at removing the pests than beaks. They also note that because they witnessed tool use in two locations separated by a wide distance, it appears likely that tool use among puffins is common.