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As the
CROWS A special report
E
fly
very evening, across the Lower Mainland, thousands of crows are seen crossing the skies at dusk, heading towards Burnaby’s Still Creek area to roost.
Whether you love them or hate them, this ubiquitous urban species thrives in the conditions we create, and the health of their populations says a lot about how we treat our environment. Jennifer Moreau takes a closer look one of the Lower Mainland’s most spectacular natural phenomenon. ◆
O
Turning in for the night: The skies above George Clulow are filled with crows over Burnaby’s Still Creek area.
The crows gather a few blocks from Still Creek. Most flock to trees and rooftops, some hop or waddle along the ground and others bob their heads while cawing from branches and wires ON MY BEAT that bow beneath their weight. Jennifer Moreau George Clulow, longtime organizer of the local count, spots an intruder crossing the open sky. “Cooper’s! Cooper’s hawk right there,” he shouts, peering through a set of binoculars. The birdwatchers chuckle at the hawk’s misfortune as an angry black swarm amasses, chasing after the predator. The hawk, which may normally make a meal out of a crow, is outnumbered by about 100 to one. “They’ll give him heck,” Clulow says. “Wrong place to fly through.” The crows continue gathering, and as the light fades,
the restlessness grows. Then suddenly – thousands of birds take flight for the creek, and from below the sky seems to spin. With all the droppings, it sounds like rain, and Clulow notes that women who work in the area have been known to walk home with parasols. We head along the Central Valley Greenway, following their flight path, into the heart of the roost. It’s dark now, but the sky is clear and moonlight fills their sleeping quarters. Every tree is full of crows, cooing and clucking as they settle down for the night. They rest till morning and depart once the light returns, with the same raucous pageantry. ◆ ccording to this year’s bird count, 23,000 crows settle at the Still Creek roost, just a few minutes’ walk from the Gilmore SkyTrain station. It’s the biggest roost in the Lower Mainland, drawing crows from miles around. They seem to prefer the trees along a small stretch of Still Creek, but many settle on rooftops and on telephone wires. In spring, the numbers drop as the adults leave to mate and build nests. The roost has been around Still Creek for as long as anyone can remember – at least
n the gravelly side of the road in Burnaby’s Still Creek business area, a handful of volunteer bird enthusiasts is wrapping up the seasonal Christmas Bird Count, with their heads turned towards the cold, dimming sky. The annual census of winter birds is finishing at the site of the largest and most spectacular local display of bird behaviour – thousands upon thousands of crows coming home to roost at dusk.
Larry Wright/burnaby now
It is estimated that 23,000 crows settle at the Still Creek roost.
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20 years, likely more. Are the numbers declining? According to the count, numbers for the roost appear to be declining, although Clulow is reluctant to make that assertion. The tally is a rough estimate at best, and it’s a bit tricky to count thousands of crows in flight. In 2001, there were 10,000, and the numbers fluctuated over the years, peaking in 2009 with 30,000 and dropping to 23,000 in 2010. Michael Jackson of Culex Environmental has studied the local roost because health officials had concerns about West Nile virus. (It turned out there was no health threat.) Jackson suspects the drop in numbers could be linked to destruction of habitat in 2006. The crows used to sleep to the east of where they are now – that was until the area was razed for development. “They were just demolishing the roost to make way for Costco and the Keg restaurant there,” Jackson says. “They were highly stressed out when they lost that roost. They were flying all through the night, getting agitated, with no Why here? Page 3
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