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The Common Loon

Common loons are large diving birds that spend their summers on open fresh water lakes and their winters on the seacoast. During the summer they sport distinctive black and white breeding plumage. They are 0.6 to 1 metres (2 to 3 ft.) long, weigh 4 to 5 kilograms (10 lbs) and have a wingspan of 1.2 to 1.5 metres (4 to 5 ft.).

What to Look For The Common Loon

Be aware of loons - be aware that if you see a loon from late June to September, chances are that one or two chicks will be close by. Keep your distance.

Listen to loons - if you approach a loon and hear it start to call, this means you are too close. Move away.

Watch what loons do - if you see a loon “dancing” straight up out of the water and slapping with its wings, it is alarmed by your presence. Move away.

Watercraft and Loons

Watercraft and Loons

There are many ways that watercraft can have a negative effect on loons:

• Power boats can send waves crashing into shorelines, drowning nests
• Fishing boats, particularly bass and pike anglers, frequent areas preferred for loon nest sites
• Canoes can slip quietly into loon nesting areas and startle loons off their nests
• Personal Watercraft (PWCs) can speed in shallow water and run over chicks
• Boats pulling water-skiers and tubers may speed near shorelines and run over chicks.


Lead Get the Lead Out

Loons, like many birds, normally ingest small pebbles (grit) in order to help digest their food. Loons often have as many as 20-30 pebbles in their gizzard at one time. Unfortunately if this material contains lead, which can be in the form of small sinkers, jigs or shotgun shot, poisoning of the loon will occur. Non-toxic alternatives such as steel and bismuth are now readily available. So - get the lead out!


Nesting Loons Nesting Loons

Most loons start to nest from the middle to the end of May. They generally lay 2 eggs which will hatch 27 to 29 days later (late June). Nests are usually on small islands or the back end of bays and inlets.

Since loons only have one or two chicks per year so every chick counts. The survival of loons depends on these chicks staying healthy until they are strong enough to fly south (late October - November).

Boat Traffic can cause a loss of Eggs!

Loon parents will leave the nest if a watercraft comes within 150 metres (500 feet) of the nest. This leaves the eggs without warmth or protection. Loon parents may abandon the nest if disturbed too often. If they try to re-nest later in the season, the likelihood of chicks hatching and surviving is very low.

Loon Chicks

Loon ChicksYoung chicks are not waterproof! They need to be able to climb on their parents’ backs to stay warm and dry. When watercraft come close, parents leave their chick to defend their territory.

Young chicks can’t dive! Young chicks are very buoyant and can’t dive very quickly or very deep. This make them particularly vulnerable to being run over by watercraft, particularly from June to September.

Chicks tire easily! The presence of watercraft causes chicks to keep swimming instead of feeding and resting. This can weaken them, affecting their ability to survive. Young chick can’t dive!

Chicks frequent open water!
It is the habit of loon parents to move the chicks away from the small bay nesting environment, out into deeper water along more open shorelines, to avoidtheir natural predators. Unfortunately this puts them into direct conflict with watercraft - particularly PWCs and boats pulling waterskiers, tubers and wake-boarders.

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