By Cathy Warwick
There is a large flock of Bohemian Waxwing flying around the North Glenmore Park, it’s great to see them back! These social birds are usually found in a tight flock that is full of non-stop trilling and fluttering. Their flocks can number in the thousands, however the one I saw looked to be about 150 birds. The best way to guarantee the number of birds is to be the only one around to count them. In this case I didn’t have much time because a car honked and they took off in a moving cloud, trilling away.
I have a soft spot for masked birds, so the Bohemian and Cedar Waxwings are always a welcome sight. These two birds are very similar to one another. However looking at their bar chart on eBird for Calgary it’s like they have two shifts, a Winter shift and a Summer shift. That makes it easy to guess which species you are looking at. The Bohemian Waxwing summers in the north, they must feel right at home in the cold, so they took the winter shift. You can also see from this chart that a few hardy (and perhaps not very bright) Cedar Waxwings stick it out here in Calgary over the winter.
How to tell if a stray Cedar is in a flock of Bohemians? The Bohemian Waxwing can be identified by its Cinnamon undertail and they are plumper and more jolly looking, than their sleeker cousin. Both birds have the sweet black mask and funky head plumage, as well as bright colors at the end of their wingtips and tails. This is where they get their name from, previous generations thought their wingtips looked like they had been dipped in wax. This is another example of how much day-to-day life has changed, the importance of wax has plummeted in the modern era.
The trilling sound they make is not a true song but a high-pitched sound that is nevertheless very distinct. I’m sure they are discussing something of great importance, probably where the dried berries are, which is their winter food. The abundance of Mountain Ash in Calgary would make you think they have it made here, however their populations see wild fluctuations. For example in the below chart we have the eBird total sightings for the winter months in Calgary. The numbers have dropped drastically, especially in 2025. As their name suggests they are wanderers at heart so we can only hope there is a berry laden place somewhere else in Alberta where they are all congregating.
Total birds on eBird checklists, Winter months. 5 year comparison:
Even if there is some other factor, like a Bohemian Waxwing loving birder has moved from Calgary, the numbers are telling us these birds aren’t around as much. In fact, although these birds are considered ‘common’, the “Partners in Flight” organization has identified them as a “Species in Steep Decline”. This organization is made up of a network of more than 150 partner organizations in the Western Hemisphere, concerned with landbirds specifically.
If you see the Bohemian Waxwings in North Glenmore, take a moment to admire them, I know I did until the horn honked, a clear warning in the cold winter air.
See also Winter Waxwings of Calgary – more photos by Ron Chiasson.
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