A record-breaking migration of saw-whet owls through northern B.C. has bird researchers at the Mughal Marsh Banding Station working overtime to handle the influx. With 266 owls caught so far this season, surpassing their usual annual total of about 100, the station faces a shortage of tracking bands for the birds. Biologist Jeannine Randall attributes the surge in owl numbers to an abundance of small rodents like mice and voles, which are the primary prey for these owls.
Written locally by qwen2.5:14b on 2026-10-02,
using this article's own text rather than the other coverage of the
same event (that is the story summary below).
Story summary
In northern British Columbia, specifically near Mackenzie and Prince George, researchers at the Mughal Marsh Banding Station are experiencing a record-breaking influx of migrating saw-whet owls. Jeannine Randall, a bird biologist from the Mackenzie Nature Observatory, reported catching 266 owls this season compared to an average of around 100, despite having two weeks left in their banding period.
This surge is attributed to an unusually high population of mice and voles, which has led to more young saw-whet owls surviving and migrating. The station faced a shortage of official tracking bands due to the influx, particularly for larger sizes used on adult owls.
The Mughal Marsh Banding Station also highlighted conservation efforts like Casper, an owl who raised hundreds of rescued owlets as her own, and recently recaptured an owl originally banded in Victoria in 2024, providing valuable insights into the species' travel patterns.
Written for “Owl Migration Record Bc” on 2026-10-05,
grounded in this article and the 0 other(s) covering the same event.
Record-breaking owl migration in northern B.C. leaves bird banders scrambling
Boom in mice and voles may have helped produce an unusually large wave of young saw-whet owls near Mackenzie
uncertain
Boom → break → Mackenzie
A massive influx of migrating owls has researchers at the Mughal Marsh Banding Station working overtime, as the birds pass through northern B.C. in numbers that haven't been seen in years.
asserted
that → migrate → years
"It has been such an amazing year up there," said Jeannine Randall, a bird biologist for the Mackenzie Nature Observatory, about 200 kilometres north of Prince George via major highways.
asserted
Randall → say → highways
"We usually catch about 100, and we've caught 266 for the season right now with two weeks still left to go.
asserted
we → catch → weeks
So it's a record-breaking year."
asserted
it → break → ?
The unprecedented surge led to an unusual problem: a shortage of the official, strictly controlled, tracking bands used to monitor the birds.
asserted
surge → lead → birds
"We were running out, in particular, of one of the sizes — because saw-whet owls, which is the main species we target, take more than one size of bands," Randall explained.
asserted
Randall → run → bands
"We were running out of the larger size of band because they were back-ordered from the bird banding office.
asserted
they → run → office
"
While the station reached out to other organizations for help, they quickly discovered that the owl boom was a widespread phenomenon, leaving many stations facing similar shortages.
asserted
boom → reach → shortages
Randall says the surge in numbers is likely related to their prey.
asserted
surge → say → prey
"Most of the owls that we're catching are birds that were hatched this year," Randall said.
asserted
Randall → catch → that
"I think the main thing that's likely driving this is an abundance of small rodents this year.
asserted
that → think → rodents
Populations overall on the decline
While the high numbers at Mackenzie are encouraging, they may not reflect the long-term reality for all owl species in the province.
uncertain
they → reflect → province
Rémi Torrenta, a biologist with Birds Canada, notes that many owl populations have actually been decreasing over the past 25 years.
asserted
populations → note → years
"Some species are pretty stable or even increasing, like the barred owls, and most species are actually ... decreasing over the past 25 years," Torrenta said.
asserted
Torrenta → increase → years
"That's probably the case of a lot of species in B.C., including the northern saw-whet owls."
asserted
That → include → owls
Torrenta explains that the high volume of owls seen this year is likely part of a well-documented four-year cycle.
asserted
volume → explain → cycle
"When there are lots of owls, there are suddenly too many owls, and the rodent population crashes the year after," Torrenta explained.
asserted
Torrenta → be → owls
"Eventually the owls don't have enough food and so they have to migrate farther south to search for food.
asserted
they → have → food
This phenomenon is called a mass eruption.
asserted
phenomenon → call → ?
"
To better understand these trends, Birds Canada co-
asserted
Canada → understand → trends
ordinates the Nocturnal Owl Survey, a citizen science program that relies on volunteers across the country to track owl numbers each spring.
asserted
that → ordinate → numbers
"Thanks to these volunteer programs ... we are able to better track owl numbers and trends across the country," Torrenta said.
asserted
Torrenta → track → country
Randall says the Mackenzie Nature Observatory banding project is an important of that wider science research, providing crucial data for monitoring owl populations and migration routes.
asserted
project → say → populations
Hope remains for owl species despite no known wild population left in B.C., conservationist says
Casper the foster mom owl has raised hundreds of rescued owlets as her own
Recently, the station recaptured an owl that had originally been banded in Victoria in 2024, offering a rare glimpse into the species' travel patterns.
asserted
that → remain → patterns
"If nobody's looking at this stuff, then we don't have the information to make management decisions or even to really understand the species well," Randall said.
asserted
Randall → look → species
The Aporia
