2018 has seen the launch of the International Shorebird Survey (ISS) in Manitoba. Each month from July to September, volunteers from the Manitoba IBA Program, Bird Studies Canada, and NCC, have traveled to Whitewater Lake and Oak Lake and Plum Lakes Important Bird Areas to carry out these surveys. Our third and (in theory), final trips were completed earlier this week, and here is a summary of the results.
On September 17th, Gillian Richards, Christian Artuso, Josiah Van Egmond, and Ed Jenkins, completed the two monitoring transects at Whitewater Lake IBA. The results were, to say the least, quite spectacular.
The total of 38,861 birds, and 99 species was highly impressive, although a mere 20,764 were noted on the ISS surveys themselves, the remaining birds seen while driving from point to point. The most abundant bird was the Red-winged Blackbird, a colossal total of 8,960 being recorded.
Ducks were also abundant, 4,046 Northern Pintail being the highest individual count, but with sizable counts of Green-winged Teal and Mallard as well. A single Greater White-fronted Goose was another standout, along with the usual totals of Snow and Canada Geese exceeding a thousand individuals.
Two Prairie Falcons and two Peregrines were also encountered, which segues nicely to the shorebirds (falcons are notoriously good at flushing shorebirds). The highlight was the Long-billed Dowitcher total of 3,217 individuals. An IBA trigger. This is fascinating. In ISS 1, we had a near trigger for this species, among several thousand dowitchers, but in ISS 2, dowitchers were almost absent. Therefore, large numbers of Long-billed Dowitchers migrated to Whitewater in July, moved on, and were replaced by large numbers in September. Dynamic populations or what! Of the other 21 species of shorebird, they counted a single Red Knot, 407 American Golden Plover, 562 Pectoral Sandpiper (a near trigger), and 542 Greater Yellowlegs.
Here is the total birds for the day, with a column for those recorded on the ISS transect, and a column for the total Whitewater Lake birds.
|ISS Transects||Total for Day|
|Greater White-fronted Goose||0||1|
|American White Pelican||72||90|
|Great Blue Heron||2||9|
On September 18th, Ward Christianson and Linda Boys headed to Oak Lake and Plum Lakes IBA. The totals here were nothing like Whitewater Lake, with only 7 species of shorebird being encountered. Numbers of American Coot, Green-winged Teal, and other dabbling ducks were beginning to build up impressively as well. There were also good numbers of Franklin’s Gulls, and Sandhill Cranes and Tundra Swans were noticeably beginning to appear in the area. Long-billed Dowitcher were the most abundant shorebird, followed by Pectoral Sandpiper, and Lesser Yellowlegs.
As the totals of non-shorebirds have not been added to eBird yet, we only include the shorebird totals below.
Photos above – another type of wading bird, the wonderful Great Egret. Copyright Linda Boys
Thanks Ward, Linda, Gillian, Josiah, Ed and Christian for all your excellent efforts this week!
For more information on ISS, and previous reports, please see:
Maps, basic instructions and Oak Lake and Whitewater Lake first trip reports
Shorebird Workshop Report – Day 1
Shorebird Workshop Report – Day 2
Whitewater Lake Second Trip Report
Story on NCC website
Story on Manomet website