HARRISON MILLS, B.C. – Throughout the Harrison River in British Columbia, thousands of eagles meet to break the salmon that has reached the land.
David Hancock, a biologist who has studied eagles for about 65 years, says that the largest community of bald eagles in the world is taking place on the river in the small community of Harrison Mills, about 100 kilometers east of Vancouver.
"Last Saturday morning I made an investigation out of the river and there were just over 7,000 eagles in the area," he said in a recent interview.
"This is the most we ever in November."
Around 35,000 eagles meet in the lower Fraser Valley between November and February, and some days move around 2,000 to 3000 birds of birds, says Hancock.
"It's the biggest single massive area because the Harrison River is the single most productive river," said Hancock.
"It is the only river in Canada called a" salmon-fortified river ".
The River of Harrison is a tributary of the Fraser River and runs about 18 kilometers long.
Like rivers in Yukon, Alaska and northern British Columbia also ice foods that cool the eagles to the south.
"Our salmon has just started to die, so the table is put here," said Hancock.
But there are other factors that contribute to the number of eagles that descend on the area.
"Sometimes the north does not freeze and the eagles do not need to come," he added.
"Some years we do not get so much salmon, so the table is not so generous."
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The eagles remain in the area until February, although a few miles can fly further south in Washington, Oregon and California when winter is deepening.
Hancock said this year, the Harrison River does not have enough salmon.
"This was not a good year to generate," he said.
When the salmon corpses disappeared, he said that the eagles ate some cupboard and oolachin, melted.
In about four years the area may not see so many eagles because overwhelming means that there will not be so many salmon corpses to eat, he said.
Photos: Eagles gathered at nearby Echo Lake
Hancock said in the last two decades researchers learned about the relationship between the huge trees in forests in the region and generated salmon.
The corpses of wild salmon give nutrition to the soil, he added, which helps trees grow.
"Without these salmon there are no large forests," said Hancock.
"This is the lesson we have learned in the last 20 years of ecology."