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

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

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.

Just Posted

Graeme Wright is the owner of Hullabaloo, a new ice cream and coffee food truck serving patrons at the Red Barn on West Saanich. (Photo by Megan Atkins-Baker/News Staff).
VIDEO: Cool treats, warm bevvies a specialty for new Saanich food truck

Hullabaloo owner Graeme Wright passionate about blending green space with sustainability

Nathan Watts, a member of the Tseshaht First Nation near Port Alberni, shares his story of substance use, a perspective he said isn’t seen enough. (Photo courtesy of Nathan Watts)
Public shaming, hate perpetuates further substance use: UVic researcher

Longtime addict Nathan Watts offers a user’s perspective on substance use

Nicky Cook and Kelly Yee set up their stand at Peninsula Country Market. (Black Press Media file photo)
Peninsula farmers markets ready to welcome back patrons

Both the Peninsula Country Market and North Saanich Farm Market plan to expand offerings in the summer

The closure of Government Street to vehicle traffic between Humboldt and Yates streets began June 11. The corridor will be pedestrian-only between noon and 10 p.m. daily until at least this fall. (Don Denton/Black Press Media)
Downtown Victoria timed closure of Government Street begins

Pedestrian priority times part of city’s Build Back Victoria program

Workers clean off the red paint sprayed on the statue of Queen Victoria at the front of the B.C. legislature Friday. It is unclear when the vandalism took place. A protest rally against old-growth logging was happening on the legislature lawns Friday afternoon. (Jake Romphf/News Staff)
UPDATE: Queen Victoria statue at B.C. legislature vandalized Friday

Statue base splattered with what looks to be red paint, old-growth logging protest held in afternoon

t
How to tell if a call from ‘CRA’ is legitimate or a scam

Expert says it’s important to verify you really are dealing with the CRA before you give out any info

The courthouse in Nanaimo. (News Bulletin file)
Nanaimo man, already in jail, found guilty of sexual abuse of sons

Man previously sentenced for sexual interference involving girl in Nanaimo

British Columbia-Yukon Community News Association’s 2021 Ma Murray Awards were handed out during a virtual ceremony on Friday, June 10. (Screen grab)
Black Press Media winners take gold at B.C. and Yukon journalism awards

Publications received nods in dozens of categories

Prime Minister Justin Trudeau greets campers while visiting McDougall, Ont. on Thursday, July 19, 2018. THE CANADIAN PRESS/Frank Gunn
71% of B.C. men say they’d prefer to go camping with Trudeau: survey

Most British Columbians with plans to go camping outdoors say they’d prefer to go with Trudeau or Shania Twain

Members of the Department of Fisheries and Oceans’ Marine Mammal Response Program rescued an adult humpback what that was entangled in commercial fishing gear in the waters off of Entrance Island on Thursday, June 10. (Photo courtesy Marine Mammal Response Program)
Rescuers free humpback ‘anchored’ down by prawn traps off Vancouver Island

Department of Fisheries and Oceans responders spend hours untangling whale

Chilliwack cocaine trafficker Clayton Eheler seen with a tiger somewhere in Asia in 2014. Eheler was sentenced to nine years jail in 2018, but was released on bail in October 2020 pending his appeal of conviction.(Facebook)
Director of civil forfeiture seeks $140,000 from Fraser Valley drug dealer’s father-in-law

Clayton Eheler’s father-in-law Ray Morrissey caught with money in Fort St. John by B.C.’s gang unit

A Comox Valley shellfish operator pleaded guilty and was fined $10,000 in provincial court in Courtenay earlier this year. Record file photo
B.C. clam harvester fined $10,000 for Fisheries Act violations

Charges against three others were stayed in Courtenay Provincial Court

Frank Phillips receives a visit from his wife Rena at Nanaimo Seniors Village on their 61st wedding anniversary, March 31, 2020. Social visits have been allowed since COVID-19 vaccination has been offered in all care homes. (Nanaimo News Bulletin)
B.C. prepares mandatory vaccination for senior care homes

180 more cases of COVID-19 in B.C. Friday, one more death

Lorraine Gibson, 90, received a COVID-19 immunization at the South Surrey Park and Ride vaccination clinic. (File photo: Aaron Hinks)
Surrey has had 25% of B.C.’s total COVID-19 cases

Surrey recorded 4,012 cases in May

Most Read