Maine Audubon is seeking volunteers to assist with the 43rd Annual Loon Count to be conducted later this month on Sebago Lake.
Loons are large, tuxedoed birds swimming about in the lake and can be very vocal and easy to locate, as the yodeling of one loon will often elicit a chorus response from other loons in the area. They are water birds, only going ashore to mate and incubate eggs.
The volunteers collect and submit data about the number of loons they observe between 7 and 7:30 a.m. which gives Audubon researchers a “snapshot” of the loon population across the state. The count allows Maine Audubon to monitor how the number of loon adults and chicks have changed over the past 40 years and to make sure it is known how to best protect the loon population.
For years, counting Sebago Lake’s 100-plus miles of shorefront on nearly one trillion gallons of fresh water and at 49 different survey areas presented a significant challenge to Maine Audubon. And despite the efforts of many volunteers, the entire lake was never fully counted.
In 2022, volunteer counters were recruited from each of the seven municipalities that border Sebago Lake and other volunteers signed up as well who wanted to be part of the count. What resulted was the first-ever full Sebago Lake count thanks to more than 50 volunteers who participated and covered more than 30,000 acres of water.
Every single number recorded during the Annual Loon Count was higher in 2025 than it was in 2024 – the number of adult loons, loon chicks, lakes counted, and volunteers – and scientists at Maine Audubon say it’s a great indication that the Common Loon population is healthy in Maine. A healthy loon population is good for many reasons, as it also means enough clear waters, healthy fish populations, and breeding habitat to support a stable loon population.
Based on its calculations, Maine Audubon estimates a 2025 population of 3,174 adults and 568 chicks for the southern half of Maine. In comparison, in 1983, when the count first began, we estimated a population of 1,417 adult loons and 176 loon chicks in the southern half of Maine, suggesting the population has more than doubled since then.
“We’re cautiously optimistic after seeing two years of growing chick numbers,” says Maine Audubon Wildlife Ecologist Tracy Hart. “But it will take several more years before we know if that is a real upward trend, or just two really good years.” Maine has the largest population of loons in the eastern United States, which makes the breeding success of loons here critical to the regional population. In comparison, there were 56 pairs counted in Massachusetts in 2024, about 100 pairs in Vermont, and 514 adults recorded on a subset of lakes in New Hampshire in that state’s 2025 census.
Most loons nest within one foot of the water’s edge, so they are especially vulnerable to washout from arge waves. All motorboats on Maine lakes are required to travel at no-wake speeds when they are within 200 feet of shore or islands. Boats that facilitate wake surfing create even larger waves and can impact loon nests even when operating as far as 500-600 feet offshore. In 2024, a new state law was implemented to address wakesurfing and it restricts individuals “from operating a motorboat in less than 15 feet of water or within 300 feet of the shoreline when the motorboat is engaged in a wakesurfing activity.”
The Common Loon faces all kinds of threats including those from boat strikes, nest flooding, tackle made from lead, eagle predators and despite that with the help of an ever-growing volunteer base, the population remains robust.
Audubon officials say that if you can’t make it to volunteer for the Annual Loon Count on July 18, or if one day just isn’t enough for you, you can still monitor loons throughout the summer. Through its Loon Pair Monitoring Project, volunteers can submit observations of breeding loon pairs over several months to help them better understand nest and chick success across Maine.
For further details about the Maine Audubon Annual Loon Count, the Loon Pair Monitoring Project, or to volunteer, contact [email protected] or visit maineaudubon.org/loons. <












