by Keith and Heather Nicol
On
Thursday, April 29 we headed down to a parking lot behind the Courtenay Museum
to see if the Vaux’s Swifts that are in the area might fly down the chimney to
roost for the evening. Evidently they have been seen coming to this chimney for
the last few years around this time of year and one person we spoke to said
they will likely be arriving here for another week or more. The Vaux’s Swifts
spend the winter in Mexico and breed in large hollow trees found in old growth
forests in BC, Washingon and Oregon. Because of this their numbers are in
decline as logging removes their breeding habitat.
The birds feed on insects and their shape has been described as cigars with wings. On Thursday we were joined by close to 15 other people who had heard about this chimney roosting behavior. We arrived at 8:00 pm armed with binoculars and a camera with a telephoto lens. Their arrival to the chimney seems to depend on the weather and so you don’t know when they might arrive. No sooner did we arrive and we began to see the swifts flying in groups over the chimney (see photo below) . They then disappeared for a few minutes only to return again for another fly over. Then all of a sudden they began to spiral around and just like Santa they headed down the chimney (see photo above) . By 8:30 it seemed to be all done! Presumably they like the rough interior of the chimney and spend the night huddled together along the edges of the chimney. But how do they navigate all crowded together as they descend into the chimney?
It was
hard to estimate the number of birds on this particular night but it was likely
around 150 birds. The Vaux’s Swifts have been here for the last few days and
other people we spoke to said that other nights they had seen upwards of 200
birds but other times virtually none. We returned another night - May 1 and saw an amazing 850 or so birds descend into the chimny. Click this video: https://www.youtube.com/watch?v=Doly-jcadTk to see the bird tornado in action. So if you want to see an unusual birding event that you won't find many places in Canada check this out!