An Atlantic puffin appears to imitate a decoy by standing on one leg on Eastern Egg Rock, Maine. Decoys were used to lure the gregarious birds ashore after they were re-introduced to the island following a 100-year absence.

Eastern Egg Rock, Maine ? It doesn’t seem to matter to one puffin waddling over to join another of the birds that his chosen companion is a one-legged, wooden decoy. Puffins love company.

The deception is one of the techniques that Stephen Kress has used to lure the colorful birds back to this rocky island.

“I used an old hunter’s trick, something that hadn’t been done with seabirds before,” Kress, director of the National Audubon’s Seabird Restoration Program, whispers as he watches from a blind about 20 yards away.

Puffins, which resemble half-pint penguins except that they can fly, were heavily hunted along the Maine coast for their meat and feathers, and by 1901 only one pair remained, researchers said.

They remained plentiful elsewhere, however, and Kress set out three decades ago to bring them back to Maine’s islands, on the southern end of their range around the North Atlantic.

In 1973, with backing from the National Audubon Society and help from the Canadian Wildlife Service, Kress began transplanting 2-week-old puffin chicks from Great Island off Newfoundland, 1,000 miles to the northeast.

These days there are 90 nesting pairs on Eastern Egg, among more than 700 nesting pairs on four Maine islands, Kress said.

Eastern Egg Rock, a treeless, seven-acre island, is a breeding ground for 6,000 surface-nesting birds: puffins, guillemots, laughing gulls, eider ducks, Leach’s storm petrels, and three species of terns.

Each summer, biologists move onto the island to oversee the project and to protect the seabirds. Two supervisors spend the whole summer on the rocky outpost, joined by rotating shifts of interns and volunteers.

A human presence is necessary to scare away predators such as great black-backed gulls and herring gulls. The large gulls – black backs have a 5 1/2-foot wingspan – rob nests and eat chicks. Earlier this summer, when five days of fog kept the volunteers away from Seal Island, another puffin nesting spot, the gulls destroyed eggs laid by 2,000 pairs of terns, Kress said.

The biologists are repaid for their protection by regular bird assaults. “Our hats, backpacks, shoes, shirts are pretty well covered in poop,” said Jeff Kimmons, a co-supervisor.

Puffins are often confused with penguins. They have similar colors, and both swim under water using their wings as fins, but they are not related and live at opposite polar ends of the world. Each puffin pair raises one chick in a burrow under big boulders, taking turns feeding their offspring fish.