World’s largest congregation of eagles begins in B.C.

The world’s largest congregation of bald eagles happens on the river in the little community of Harrison Mills

Along the Harrison River in B.C.’s Fraser Valley, thousands of eagles are gathering to gorge on salmon that have reached the spawning ground.

David Hancock, a biologist who has been studying eagles for about 65 years, says the world’s largest congregation of bald eagles happens on the river in the little community of Harrison Mills, about 100 kilometres east of Vancouver.

“Last Saturday morning I did a survey off the river and there were just over 7,000 eagles in the area,” he said in a recent interview. “This is the most we’ve ever had in November.”

About 35,000 eagles gather in the lower Fraser Valley between November and February, and some days about 2,000 to 3,000 raptors move in, Hancock said.

“It’s the biggest single accumulating area because the Harrison River is the single most productive river,” said Hancock. “It’s the only river in Canada called a salmon stronghold river.”

The Harrison River is a tributary of the Fraser River and runs about 18 kilometres in length.

READ MORE: Fraser Valley Bald Eagle Festival explodes in popularity, draws thousands to Mission, Harrison Mills

READ MORE: Record-breaking bald eagle numbers predicted in Harrison Mills this fall

As rivers in Yukon, Alaska and northern British Columbia ice up food supplies freeze too, which forces the eagles south.

“Our salmon are just beginning to die so the table is set down here,” said Hancock.

But there are other factors that contribute to the number of eagles that descend on the area.

“Sometimes the north doesn’t freeze up and the eagles don’t need to come,” he added. “Some years we don’t get as many salmon so the table isn’t as generously set.”

The eagles remain in the area until February although a few thousand may fly further south into Washington, Oregon and California as winter deepens.

Hancock said this year, the Harrison River does not have enough salmon.

“This was not a good year for spawning,” he said.

When the salmon carcasses are gone, he said the eagles feed on spawned herring and oolachin, a smelt.

In about four years the area might not see as many eagles because overharvesting means there won’t be as many salmon carcasses for them to feed on, he said.

Hancock said in the last two decades researchers have learned about the connection between the huge trees in forests in the area and spawned salmon. The carcasses of spawned salmon give nutrition to the soil, he added, which helps trees grow.

“Without those salmon there are no big forests,” Hancock said. “That’s the lesson we learned in the last 20 years of ecology.”

The Canadian Press

Like us on Facebook and follow us on Twitter.

Get local stories you won't find anywhere else right to your inbox.
Sign up here

Just Posted

West Shore Rotary Club raises $20,000 with Golf Ball Drop fundraiser

Nearly 4,000 golf balls poured onto Olympic View golf course Saturday

Construction slows weekend traffic at Millstream overpass

West Shore RCMP recommend Leigh Road exit instead

TRAFFIC: Saanich emergency crews responding to Pat Bay Highway collision

Incident took place at Haliburton Road intersection

Saanich race car driver shifts gears as pandemic cuts U.S. season short

Bill Okell, 65, sets sights on Canadian racing circuit for 2020

Chorus expands online options to in-person rehearsal in Langford, Oak Bay

Free, non-auditioned SingYourJoy recruits those aged 16 to 29

B.C. records 98 more COVID-19 cases, most in Lower Mainland

One new senior home outbreak, Surrey Memorial outbreak over

POLL: Do you agree with the decision to call a provincial election for Oct. 24?

British Columbians will put their social distancing skills to the test when… Continue reading

Is it time to start thinking about greener ways to package cannabis?

Packaging suppliers are still figuring eco-friendly and affordable packaging options that fit the mandates of Cannabis Regulations

Join Black Press Media and Do Some Good

Pay it Forward program supports local businesses in their community giving

Vancouver Island Tour de Rock riders roll into Parksville Qualicum Beach

Saturday’s schedule includes Port Alberni, Ucluelet and Tofino, followed by Nanaimo on Sunday

97 distressed horses, cats and dogs seized from farm in Princeton

RCMP assisted as BC SPCA executed search warrant

$250K reward offered as investigation continues into Sea to Sky Gondola vandalism

Police also asking for specific footage of Sea to Sky highway around time of incident

Most Read