Caws for alarm: Swooping crows descend on passersby as they protect their young

If she were back home in Ireland, Aiofe Bagnall saysshe would never have to worry about walking down the street minding her own businessand being swooped from behind in an unprovoked attack by a ticked-off crow.

But she's in Vancouver now.

"It was so intense. I was terrified," Bagnall said, describing a seemingly random crow attack from a week earlier.

"They just dived down, like, got the back of my neck and then its wings are, like, flapping in my hair."

In Metro Vancouverand beyond, crow swoopings are a common, if Hitchcockian, springtime experience.

The reason? These passerines are just protective parents. It's fledgling season and the birds are trying to scare away anything that could threatentheir vulnerable young.

The problem for many humansis crowstend to see almost anyone as a threat.

'Those crows are busy'

For years, Jim O'Leary, an instructor at Vancouver's Langara College, has been watching the skies without watching the skies.

A geographic information system (GIS) expert, O'Leary developed a website several years ago called Crowtrax.

It allows peoplewho have been attacked by crows toreport details of the swooping: location, time, the scale of aggressiveness. You can even report if it involvedthe now-vanished Canuck the Crow.

O'Leary says reports started trickling in about a month ago, but now they're flying in.

"Those crows are busy out there. [Swoopings] can be very traumatic and people need to express 'What has happened to me,' so there's sort of that therapeutic aspect to it," O'Leary said of his website.

"The other thing that's interesting is how people anthropomorphize these attacks it's easy to do because crows are very smart."

The hot spot for attacks? Vancouver's West End, O'Leary says.

"Where you find tall leafy trees and a lot of people and a lot of restaurants, you're going to find crow-human interactions," he said. "Lots of them."

Parenting can be murder

Erin Ryan, a wild animal expert with the B.C. SPCA, says it's understandable for crows to be on edge this time of year.

Fledglings are just starting to leave the nest and learning to fly. That leaves them exposed.

"There's a lot that can go wrong, so I think it's fair that they're pretty worried," Ryan said.

WATCH | Whyterrorizing humans makes swooping crows good parents:

Why are crows swooping, swiping and divebombing people forseemingly no reason?

1 year ago

Duration 0:54

SPCA wild animal expert Erin Ryan says it's fledglingseason for the next month or so, and that has crows attacking threats.Too bad they can see everyone and anyone as a threat to theirvulnerable young.

"So they'll often swoop down, they'll fly very close.They may even brush the back of your head, but they're really just trying to say, 'Stay away.'"

Ryan has experienced it firsthand. At least one nest is near her Kitsilano home.

It's leading to lots of welcome entertainment for her cats and lots of unwelcomeswoopings for the neighbourhood.

As she walked around the block to her usual coffee shop Wednesday, one crow started to aerially intimidate her with dive-bombing manoeuvresaround her head.

But she's not upset.

"I'm thinking about it from their perspective as an anxious parent," Ryan said. "They're repeatedly telling me to stay away from their babies and I keep coming back. You can imagine how frustrating that must be for them."

Young birds face threats

For crows, fledgling season can be downright dangerous, said Jackie McQuillan with the Wildlife Rescue Association of B.C.

Their animal hospital is taking care of several injured and orphaned fledglings.

"They're easily picked up by cats and dogs will grab them, give them a good shake," McQuillan said. "Sometimes they'll hop out into traffic andget clipped by a car or even stepped on."

When being cared for by humans, she explained, efforts must be madeto avoid having the birds associatehumans with food. That means staff have to cover their faces as they slowly make finding food an increasingly realistic challenge for fledglings.

"Because crows are so intelligent, they learn a lot from their parents, which means that they are more difficult for a rehabilitator to care for," she said.

McQuillan, Ryan and O'Leary all said anyone being swooped in their day-to-day activities should consider changing their routines to avoid nesting areas. Or, like many in the province, carry an umbrella to provide a visual barrier for the crow.

And have a thought for these stressed-out parents.

"They're animals looking after their young," Bagnall said.

The SPCA says fledgling season ends in July.