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The cry of the loon

The common loon's welfare is a major concern at La Mauricie national park whose staff has been monitoring the loon population since 1987, contributing invaluable knowledge on a bird on the brink of danger. Full text written by Philippe Henry is available on request.

Great northern diver (Gavia immer), adult flapping its wings on a lake, La Mauricie National Park, Quebec, Canada.Great northern diver (Gavia immer), adult flapping its wings on a lake, La Mauricie National Park, Quebec, Canada.© Philippe Henry / Biosphoto - RMNon exclusive sale
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2456499

2456499

Great northern diver (Gavia immer), adult flapping its wings on a

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Great northern diver (Gavia immer) carrying his chick on his back, La Mauricie National Park, Quebec, CanadaGreat northern diver (Gavia immer) carrying his chick on his back, La Mauricie National Park, Quebec, Canada© Philippe Henry / Biosphoto - RMNon exclusive sale
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2555139

Great northern diver (Gavia immer) carrying his chick on his

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Great northern diver (Gavia immer), adult preening on a lake, La Mauricie National Park, Quebec, Canada.Great northern diver (Gavia immer), adult preening on a lake, La Mauricie National Park, Quebec, Canada.© Philippe Henry / Biosphoto - RMNon exclusive sale
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2456501

Great northern diver (Gavia immer), adult preening on a lake, La

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Great northern diver (Gavia immer), adult on its nest on the shore of a lake, La Mauricie National Park, Quebec, Canada.Great northern diver (Gavia immer), adult on its nest on the shore of a lake, La Mauricie National Park, Quebec, Canada.© Philippe Henry / Biosphoto - RMNon exclusive sale
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Great northern diver (Gavia immer), adult on its nest on the

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Great northern diver (Gavia immer), adult on its nest on the

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Great northern diver (Gavia immer),adult leaving the nest, eggs visible in the nest , La Mauricie National Park, Quebec, Canada.Great northern diver (Gavia immer),adult leaving the nest, eggs visible in the nest , La Mauricie National Park, Quebec, Canada.© Philippe Henry / Biosphoto - RMNon exclusive sale
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2456498

Great northern diver (Gavia immer),adult leaving the nest, eggs

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Great northern diver (Gavia immer) four-month-old swimming on a lake., La Mauricie National Park, Quebec, CanadaGreat northern diver (Gavia immer) four-month-old swimming on a lake., La Mauricie National Park, Quebec, Canada© Philippe Henry / Biosphoto - RMNon exclusive sale
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2555145

Great northern diver (Gavia immer) four-month-old swimming on a

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Great northern diver (Gavia immer), adult swimming on a lake at sunrise with a foggy atmosphere, La Mauricie National Park, Quebec, Canada.Great northern diver (Gavia immer), adult swimming on a lake at sunrise with a foggy atmosphere, La Mauricie National Park, Quebec, Canada.© Philippe Henry / Biosphoto - RMNon exclusive sale
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2456508

Great northern diver (Gavia immer), adult swimming on a lake at

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Great northern diver (Gavia immer) feeding its three-month-old child, La Mauricie National Park, Quebec, CanadaGreat northern diver (Gavia immer) feeding its three-month-old child, La Mauricie National Park, Quebec, Canada© Philippe Henry / Biosphoto - RMNon exclusive sale
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Great northern diver (Gavia immer) feeding its three-month-old

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Great northern diver (Gavia immer), Adult with a small trout in its beak. Loon bringing food for its young. La Mauricie National Park, Quebec, CanadaGreat northern diver (Gavia immer), Adult with a small trout in its beak. Loon bringing food for its young. La Mauricie National Park, Quebec, Canada© Philippe Henry / Biosphoto - RMNon exclusive sale
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2555144

Great northern diver (Gavia immer), Adult with a small trout in

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Great northern diver (Gavia immer), Adult swimming next to its chick on a lake, La Mauricie National Park, Quebec, Canada.Great northern diver (Gavia immer), Adult swimming next to its chick on a lake, La Mauricie National Park, Quebec, Canada.© Philippe Henry / Biosphoto - RMNon exclusive sale
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2456535

Great northern diver (Gavia immer), Adult swimming next to its

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Great northern diver (Gavia immer) male feeding a chick on the female's back. He gives her a dragonfly larva. La Mauricie National Park. Quebec. CanadaGreat northern diver (Gavia immer) male feeding a chick on the female's back. He gives her a dragonfly larva. La Mauricie National Park. Quebec. Canada© Philippe Henry / Biosphoto - RMNon exclusive sale
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Great northern diver (Gavia immer) male feeding a chick on the

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During the summer, it is not uncommon to see several loons (Gavia immer) together on a lake. These birds are very often chased by the breeding pair of this lake which is very territorial. La Mauricie national park. Quebec. Canada CanadaDuring the summer, it is not uncommon to see several loons (Gavia immer) together on a lake. These birds are very often chased by the breeding pair of this lake which is very territorial. La Mauricie national park. Quebec. Canada Canada© Philippe Henry / Biosphoto - RMNon exclusive sale, exclusive sale possible in France
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During the summer, it is not uncommon to see several loons (Gavia

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Great northern diver (Gavia immer), adult swimming on a lake at sunrise in mist, La Mauricie National Park, Quebec, Canada.Great northern diver (Gavia immer), adult swimming on a lake at sunrise in mist, La Mauricie National Park, Quebec, Canada.© Philippe Henry / Biosphoto - RMNon exclusive sale
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2456505

Great northern diver (Gavia immer), adult swimming on a lake at

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Biologist Dennis Masse close to a flooded nest with two abandoned eggs half-submerged but still intact. The breeding pair that left it behind probably built another nest where the female laid a second clutch. La Mauricie national park. Quebec. CanadaBiologist Dennis Masse close to a flooded nest with two abandoned eggs half-submerged but still intact. The breeding pair that left it behind probably built another nest where the female laid a second clutch. La Mauricie national park. Quebec. Canada© Philippe Henry / Biosphoto - RMNon exclusive sale, exclusive sale possible in France
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Biologist Dennis Masse close to a flooded nest with two abandoned

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A few years ago, I and wildlife biologist Denis Masse, today retired, went on one of the 150 lakes of La Mauricie national park. Mr Masse worked for the park's conservation service and wanted to verify whether a pair of common loons has used one of the nesting rafts built here. These rafts are never submerged by water and they allow the loons to carry out the incubation of the eggs even if the water level rises on the lake during heavy rains. La Mauricie national park, Quebec. CanadaA few years ago, I and wildlife biologist Denis Masse, today retired, went on one of the 150 lakes of La Mauricie national park. Mr Masse worked for the park's conservation service and wanted to verify whether a pair of common loons has used one of the nesting rafts built here. These rafts are never submerged by water and they allow the loons to carry out the incubation of the eggs even if the water level rises on the lake during heavy rains. La Mauricie national park, Quebec. Canada© Philippe Henry / Biosphoto - RMNon exclusive sale, exclusive sale possible in France
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2564303

A few years ago, I and wildlife biologist Denis Masse, today

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A biologist from The Canadian Wildlife Service captures a common loon (Gavia immer) at night. In La Mauricie national park, 35 breeding loons were captured and feathers and blood samples were collected for mercury analysis. La Mauricie national park. Quebec, CanadaA biologist from The Canadian Wildlife Service captures a common loon (Gavia immer) at night. In La Mauricie national park, 35 breeding loons were captured and feathers and blood samples were collected for mercury analysis. La Mauricie national park. Quebec, Canada© Philippe Henry / Biosphoto - RMNon exclusive sale, exclusive sale possible in France
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2564302

A biologist from The Canadian Wildlife Service captures a common

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A common loon is released after biologists have taken blood samples for mercury analysis and have banded the bird. The banding of loons provides a reliable field method to re-observe individuals over many years and to track whether or not they are returning to their breeding lakes each summer. Additionally, banded loons are occasionally encountered alive or deceased on their non-breeding areas. A recovered banded loon provides important information on that individual’s or possibly, an entire breeding population’s wintering range. La Mauricie national park. Quebec. CanadaA common loon is released after biologists have taken blood samples for mercury analysis and have banded the bird. The banding of loons provides a reliable field method to re-observe individuals over many years and to track whether or not they are returning to their breeding lakes each summer. Additionally, banded loons are occasionally encountered alive or deceased on their non-breeding areas. A recovered banded loon provides important information on that individual’s or possibly, an entire breeding population’s wintering range. La Mauricie national park. Quebec. Canada© Philippe Henry / Biosphoto - RMNon exclusive sale, exclusive sale possible in France
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A common loon is released after biologists have taken blood

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A common loon is released after biologists have taken blood

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Biologists from the Canadian Wildlife Service take common loon blood samples for mercury analysis. La Mauricie national park. Quebec. CanadaBiologists from the Canadian Wildlife Service take common loon blood samples for mercury analysis. La Mauricie national park. Quebec. Canada© Philippe Henry / Biosphoto - RMNon exclusive sale, exclusive sale possible in France
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Biologists from the Canadian Wildlife Service take common loon

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A common loon is released after biologists have taken blood

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Common loon (Gavia immer) sitting on the nest buil on a well vegetated mainland shoreline. .Incubation by both sexes 24-31 days. La Mauricie national park. Quebec. CanadaCommon loon (Gavia immer) sitting on the nest buil on a well vegetated mainland shoreline. .Incubation by both sexes 24-31 days. La Mauricie national park. Quebec. Canada© Philippe Henry / Biosphoto - RMNon exclusive sale, exclusive sale possible in France
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Common loon (Gavia immer) sitting on the nest buil on a well

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Common loon (Gavia immer) carrying two chicks on his back. Within hours of hatching, the young begin to leave the nest with the parents, swimming close by and sometimes riding on one parent's back. La Mauricie national park. Quebec. CanadaCommon loon (Gavia immer) carrying two chicks on his back. Within hours of hatching, the young begin to leave the nest with the parents, swimming close by and sometimes riding on one parent's back. La Mauricie national park. Quebec. Canada© Philippe Henry / Biosphoto - RMNon exclusive sale, exclusive sale possible in France
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Common loon (Gavia immer) carrying two chicks on his back. Within

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A month and half common loon (Gavia immer) chick flapping the wings. Thanks to the backlight we can see that the feathers of the chick are beginning to develop. La Mauricie national park. Quebec. CanadaA month and half common loon (Gavia immer) chick flapping the wings. Thanks to the backlight we can see that the feathers of the chick are beginning to develop. La Mauricie national park. Quebec. Canada© Philippe Henry / Biosphoto - RMNon exclusive sale, exclusive sale possible in France
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A month and half common loon (Gavia immer) chick flapping the

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Common loon (Gavia immer) sitting on the nest built on the mainland shoreline. .Incubation by both sexes 24-31 days. La Mauricie national park. Quebec. CanadaCommon loon (Gavia immer) sitting on the nest built on the mainland shoreline. .Incubation by both sexes 24-31 days. La Mauricie national park. Quebec. Canada© Philippe Henry / Biosphoto - RMNon exclusive sale, exclusive sale possible in France
Sale prohibited by some Agents
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2564318

Common loon (Gavia immer) sitting on the nest built on the

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Tourist Diane Meilleur on a canoe trip in La Mauricie national park. Every summer, thousands of visitors flock to the lakes in La Mauricie national park to go kayaking, canoeing and fishing, bringing them into contact with the breeding loons (Gavia immer). The presence of the common loon on the lakes makes canoe trips more enjoyable. la Mauricie national park. Quebec. CanadaTourist Diane Meilleur on a canoe trip in La Mauricie national park. Every summer, thousands of visitors flock to the lakes in La Mauricie national park to go kayaking, canoeing and fishing, bringing them into contact with the breeding loons (Gavia immer). The presence of the common loon on the lakes makes canoe trips more enjoyable. la Mauricie national park. Quebec. Canada© Philippe Henry / Biosphoto - RMNon exclusive sale, exclusive sale possible in France
Sale prohibited by some Agents
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Tourist Diane Meilleur on a canoe trip in La Mauricie national

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Common loon (Gavia immer) sitting on the nest built on small island on the middle of a lake. Incubation by both sexes 24-31 days. La Mauricie national park. Quebec. CanadaCommon loon (Gavia immer) sitting on the nest built on small island on the middle of a lake. Incubation by both sexes 24-31 days. La Mauricie national park. Quebec. Canada© Philippe Henry / Biosphoto - RMNon exclusive sale, exclusive sale possible in France
Sale prohibited by some Agents
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Common loon (Gavia immer) sitting on the nest built on small

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A common loon (Gavia immer) chick seems to have established his dominance rank "peck order" over the other youngster. This will determine the priority between them concerning the necessities of life, namely food priority, priority of protection by the parent. La Mauricie national park. Quebec. CanadaA common loon (Gavia immer) chick seems to have established his dominance rank "peck order" over the other youngster. This will determine the priority between them concerning the necessities of life, namely food priority, priority of protection by the parent. La Mauricie national park. Quebec. Canada© Philippe Henry / Biosphoto - RMNon exclusive sale, exclusive sale possible in France
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A common loon (Gavia immer) chick seems to have established his

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Juvenile common loon (Gavia immer) taking off. Juvenile loons are on their own after about 12 weeks. The parents head off on migration in the fall, leaving juveniles to gather into flocks on northern lakes and make their own journey south a few weeks later. Once the juveniles reach coastal waters on the ocean, they stay there for the next two years. In the third year, young loons return north, although they may not breed for several more years (on average they are six years old when they start breeding). La Mauricie national park. Quebec. CanadaJuvenile common loon (Gavia immer) taking off. Juvenile loons are on their own after about 12 weeks. The parents head off on migration in the fall, leaving juveniles to gather into flocks on northern lakes and make their own journey south a few weeks later. Once the juveniles reach coastal waters on the ocean, they stay there for the next two years. In the third year, young loons return north, although they may not breed for several more years (on average they are six years old when they start breeding). La Mauricie national park. Quebec. Canada© Philippe Henry / Biosphoto - RMNon exclusive sale, exclusive sale possible in France
Sale prohibited by some Agents
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Juvenile common loon (Gavia immer) taking off. Juvenile loons are

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The cry of the loon