As spring approaches, the numbers and diversity at Portland’s Westmoreland Park are starting to wain. The winter gull flock is down to Glaucous-winged X Western hybrids and two Herring Gulls. While there is no shortage of white-cheeked geese, there were very few other species of waterfowl on this visit.
The highlight of this trip was a pair of Hooded Mergansers squabbling over a large crayfish. The female finally won possession and, with a great deal of effort, swallowed the crustacean.
There must be some powerful muscles in that little neck.
Two Eurasian Wigeons, both females, remain with the local American Wigeon flock. Here is one of the Eurasians next to a male American.
Here is a close-up of the Eurasian Wigeon. Note the warm brown color and the lack of a black outline around the base of the bill.
Taverner’s Cackling Goose, with a partial white neck ring. It will be just a few weeks before these birds head back north, and we will have to console ourselves with warblers and flycatchers.
I led a tour on Sauvie Island this week. This is a great time of year for birding Sauvie, as the hunting season is over and there are still large flocks of waterfowl and wintering sparrows.
Here are some Snow Geese within a flock of Dusky Canada Geese. If you look closely you will find one Taverner’s Cackling Goose and a couple of Mallards.
One Greater White-fronted Goose was hanging out with the Taverner’s Cackling Geese. Greater White-fronts are hard to come by in winter, so we were fortunate to find this individual.
Green-winged Teal, the smallest duck in North America, and one of the prettiest
A very distant view of a Rough-legged Hawk
Westmoreland Park, in southeast Portland, is always worth a quick visit in winter.
This Canvasback has a mud on her face from rooting around in the bottom of the pond.
At least two female Eurasian Wigeons have been spending the winter at Westmoreland. No males have been reported yet this year.
This park is one of best gull sites in Portland, although by this time the gull flock is starting to thin out. This is a sleepy Herring Gull.
Westmoreland is also a good spot for studying the various subspecies of the white-cheeked goose complex. This is a Taverner’s Cackling Goose, identified by her medium bill (covered in down for some reason), blocky head, and pale breast.
Ridgeway’s Cacking Goose (stubby bill, round head, dark breast)
Western Canada Geese have long snakey necks, long bills, and pale breasts. While common in Cackling Geese, it is unusual to see such a distinct white neck ring on a Western Canada.
Western Canada Goose bathing
I birded Ankeny National Wildlife Refuge in preparation for my waterfowl class. Waterfowl numbers have dropped considerably in the past week, suggesting that some birds have already started their northward migration.
Pintail Marsh hosted this small flock of Tundra Swans and Dusky Canada Geese. Protecting winter habitat for the rare Duskies was the main reason for establishing the Willamette Valley National Wildlife Refuge Complex.
Most of the wintering geese were grazing in fields surrounding the marshes. The flock consists mostly of Taverner’s Cackling and Ridgeway’s Cackling Geese.
These very alert Northern Pintails seemed to be keeping watch over the nearby Green-winged Teals and American Wigeons.
Ankeny has two boardwalks that provide access to flooded woodland habitat. This is the Rail Trail.
This Brown Creeper was probing patches of moss on the tree trunk.
If you look closely you can see he is holding a tiny organism in his bill.
Westmoreland Park (Birding Oregon p. 69) is one of Portland’s premier loafing spots for gulls and waterfowl in autumn and winter. The city is planning to restore the natural flow of the creek in what is now an urban duck pond, so it will be interesting to see how these changes will affect bird use over time.
The main pond, with a few hundred Cackling Geese
This female Surf Scoter has been hanging out for about a week. She is apparently finding enough mollusks to eat in this muddy pond. A few of these sea ducks are found on the Columbia River and on larger bodies of water in winter, but they are unexpected on such a small pond.
She spent a lot of time feeding under water.
Westmoreland is one of the easier places to find a cooperative Thayer’s Gull.
Ridgeway’s Cackling Goose (Branta hutchinsii minima) is the most common of the “white-cheeked” geese in the Willamette Valley in winter.
The Cackling Geese graze in the lawns at Westmoreland, but are more cautious than some of the other waterfowl.
Taverner’s Cackling Goose (B. h. taverneri) in the foreground, with a Ridgeway’s Cackling Goose in the background
Taverner’s Cackling, with another Ridgeway’s Cackling in the background
This Rock Pigeon was enjoying a bath at the pond’s edge.
It is time for another installment in the constant effort to separate Lesser Canada Goose (Branta canadensis parvipes) from Taverner’s Cackling Goose (Branta hutchinsii taverneri). The two species overlap in size and coloring, but structural differences are often apparent to those of us nerdy enough to study lawns covered in geese.
Here are two Western Canada Geese (B. c. moffitti) and a Lesser Canada Goose. They are nearly identical in color and shape, but the Lesser is about 2/3 the size of the Western. This is your best clue to identifying Lessers.
Without the size comparison, you might be hard pressed to distinguish this Lesser Canada from a Western. The neck is long and thin. The bill and forehead form a smooth, gentle slope.
Compare these Taverner’s to the Lesser. On a Taverner’s Cackling Goose, the neck appears thicker and often shorter. The forehead forms a noticeable bump where it meets the bill. (This causes the bill to appear stubby, but there actually isn’t much difference in the bill shape between the two species.) The breast on Taverner’s is often lighter in color than that of Lesser Canada, but both species show a lot of individual variation.
An arctic air mass brought cold temperatures and ice to Fernhill Wetlands (Birding Oregon p. 61), but there was no shortage of birds. Here are some grainy gray photos from a lap around the ponds.
Tundra Swans and California Gull
Taverner’s Cackling Goose and Northern Shovelers
Cackling Geese and Northern Pintails
Snow Goose and Cackling Geese
immature Bald Eagles
This American White Pelican, a very late straggler, was circling high overhead, trying to find a thermal on this cold cloudy morning.
Cackling Cackling Geese
Great Blue Heron standing on a Beaver dam. Note the frost on the bird’s back.
It’s time for another installment of my attempts to sort out the Canada/Cackling Goose complex. I recently had nice views of a Lesser Canada Goose (Branta canadensis parvipes).
This bird stood out from the nearby Western Canada Geese by the slightly darker barring on his upper breast. Some populations of this subspecies are considerably darker than this.
Here is the Lesser Canada in front of the larger Western Canada Goose (Branta canadensis moffitti). Note the smaller overall size of the Lesser, and the proportionally shorter neck.
Lesser Canada Goose in profile. The bill is almost half the total length of the head. The upper neck is quite thin.
Compare these Taverner’s Cackling Geese (Branta hutchinsii taverneri) to the Lesser Canada. Taverner’s Cackling has a uniformly thick neck and shorter bill. Notice how the wing tips extend just beyond the end of the tail. Canada Geese have shorter wings.
Here is a Taverner’s Cackling Goose within a flock of Cackling Cackling Geese (Branta hutchinsii minima). Note the longer thick neck and slightly longer bill than those on minima.