Posted by Dan Arndt

The last 48 hours in Calgary have seen a massive shift in temperature and weather. On Friday the temperature took a dive from 15 degrees Celsius down to -5 C, followed by Saturday being interspersed with heavy snow, high winds, and a steady decline in temperature. On Saturday night the temperature took another drop, and upon waking up on Sunday morning, there was a good 2 centimeters of snow accumulation. I knew right away that the birding was going to be great on the Glenmore Reservoir, and I was not disappointed. Nearly 4000 birds were seen out on the water, many of which came in for good, close views, but the majority of them were too far to get usable photos. Luckily for us, some of the less common ones were close enough to see quite well!

By far the majority of the birds were on the west side of the reservoir, but the Surf Scoters, White-winged Scoters, Common Loons and lone Double-crested Cormorant were in the better-protected eastern bay, closer to the Bayview neighborhood.

South Glenmore Park

By far the most numerous birds were the American Coots, which had flocked together overnight to number over 1500 individuals in flocks between 20 and 300. We were greeted at the starting point by this Canada Goose who decided that, for once, it would be appropriate to use the boat launch ramp.

Canada Goose

We also had a perfect vantage point to watch this Bald Eagle and its mate harass one of the larger flocks of American Coots in hopes of picking off a straggler.

Bald Eagle

Shortly followed by this Common Raven and its mate flying into the spruce above the Glenmore Canoe Club to harass the Bald Eagles who had set down moments before.

Common Raven

As we scanned the flocks of American Coots, we saw interspersed in their numbers a few Green-winged Teal, Gadwall, Northern Shovelers, and American Wigeons. The main highlight though were the occasional Horned and Eared Grebes that flocked together and seemed to spent as much, if not more time under water diving for vegetation to fuel their migration south.

lone Eared Grebe in non-breeding plumage

At the east side of the Canoe Club, we found this lone Pied-billed Grebe taking refuge near the docks, resting up and staying hidden from predators.

Pied-billed Grebe

As we neared the end of the point, we came up right against the largest raft of American Coots, and we even managed to pick out a few juveniles just coming into their adult plumage. In the photo below are at least two American Coots whose heads are light grey as opposed to the fully matured individuals with the black head plumage.

American Coots

Moments later a few Trumpeter Swans that we saw on the very far end of the reservoir took off and flew directly toward us. They slowly veered south, but not before getting close enough to allow us to get a few flight shots.

Trumpeter Swans

Working our way on to the east, these three Eared Grebes thought it would be a good learning experience to show us what their breeding plumage looks like, as opposed to their usual non-breeding plumage we’d seen so far for the day.

Eared Grebes

The true highlight of the day though was a group of Surf Scoters and White-winged Scoters in the east bay. While I’ve seen White-winged Scoters a bit closer this year on the Reservoir, and Surf Scoters much earlier during the May Species Count here in Calgary, and even closer on the Iona Jetty in Vancouver, it was a real treat to be able to show these uncommon migrants to our group attendees. This is the very best part of leading these groups and why I love birding. These teachable moments and exposure to new birds like this are more than worth the slight discomfort of the cold.

White-winged Scoters

Surf Scoters

Last Saturday I spent some time down on the Glenmore Reservoir and was able to get much closer to a pair of White-winged Scoters, and managed to snag this shot of an adult male in much better light conditions.

White-winged Scoter – October 13

And these Surf Scoters are from Iona Jetty in Vancouver, B.C. in early September of this year.

Surf Scoters – Vancouver

Have a great week, and good birding!