A significant number of migrating owls have kept the Mugaha Marsh Banding Station researchers busy as they travel through northern British Columbia in remarkable numbers not seen in years. Jeannine Randall, a bird biologist at the Mackenzie Nature Observatory, expressed excitement about the current year’s owl migration, noting a record-breaking catch of 266 owls so far, surpassing the usual count of around 100. The surge in owl numbers has caused a shortage of the necessary tracking bands, mainly due to the popularity of saw-whet owls that require multiple band sizes.
Despite reaching out to other organizations for assistance, the banding station found that the owl boom was widespread, leading to shortages at multiple stations. Randall attributes the increase in owl numbers to the abundance of small rodents this year, with most of the captured owls being hatchlings. While the high numbers at Mackenzie are positive, biologist Rémi Torrenta from Birds Canada highlights a general decline in owl populations over the past quarter-century, including the northern saw-whet owls.
Torrenta explains that the peak owl population observed this year is likely part of a documented four-year cycle, where an overpopulation of owls results in a subsequent crash in the rodent population the following year. To monitor these trends, Birds Canada coordinates the Nocturnal Owl Survey, a citizen science initiative that relies on volunteers nationwide to track owl numbers each spring. Randall emphasizes the importance of the Mackenzie Nature Observatory banding project in contributing vital data for studying owl populations and migration patterns.
In a recent discovery, the station recaptured an owl originally banded in Victoria in 2024, shedding light on the species’ travel behaviors. Randall underscores the significance of such research in making informed management decisions and enhancing species understanding.