September goulash


This September’s goulash is thin gruel: only two previously unposted images from a generally sparse month of postings.

There are two unusual features to this picture of a chipmunk. I usually see chipmunks in the mountains rather than at the bottom of valleys. Further, this little fellow has been spending a week raiding a bird feeder and is seen here working on one of its seeds. I am used to squirrels raiding bird feeders, but not chipmunks. This is all rather odd.

This is an immature Bald Eagle with wings spread to apparently dry them after fishing for Kokanee in the stream below. Whenever I see an eagle drying its wings in this way, they are not spread wide, but shaped in a delta. Possibly this is to make it easier for water to drip off them.

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Magpie iridescence


Magpies do not favour this region because it is highly forested. These birds prefer open habitats with occasional clumps of trees. Consequently, there are few opportunities to capture pictures of magpie iridescence.

The pigmentation of a magpie’s feathers produces a plumage that is strictly black or white. Yet in some lightings, the black feathers on the wings and tail produce brilliant colours, particularly blues and greens. These colours do not result from pigmentation, but iridescence.

Cells in the iridescent feathers contain a basal melanin layer, which produces the black by absorption. Above are stacked reflecting platelets, which produce the iridescent colours when light reflected from one layer interferes with that from another. The resulting colours are bright, pure and strongly directional. A bird can use this for flashing a signal in one direction, while remaining inconspicuous to a predator in another direction. 

Of the handful of pictures of the Black-billed Magpie I have taken, only a few of them show the blue-green iridescence of the wings. In this picture, taken two days ago, the tail just looks black.

However, contrast that black tail with the brightly iridescent tail of the same bird seen a half-minute later. Who knows what signal it is attempting to send?


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Pileated in training


It is not a regular sight to see two Pileated Woodpeckers jointly foraging on the same tree. On the two previous occasions the foragers were a male and female. As the Pileated Woodpecker is both monogamous and territorial, a foraging couple makes sense.

So yesterday, when I came upon two woodpeckers foraging on a utility pole, I just assumed that these two were also a male and female. Yet, the pictures revealed them to both be male.

The territoriality of Pileated Woodpeckers suggests that these two males are either rivals or family. The two of them seemed to work together and passed signals back and forth, so they probably are not rivals. But, is it a case of a father training a son? 

Cornell Lab of Ornithology notes: “Once fledgling Pileated Woodpeckers can fly well, they follow adults everywhere, depending on their parents for several months to provide and help find food. Come fall, young will separate from their parents and wander until spring, when they will attempt to acquire a mate and nest.” So, this pair is likely to be a parent and child and the pictures, below, are interpreted in the light of this assumed relationship.

Adults have yellowish eyes, while the chicks have brownish eyes. While the difference is not striking with these two, the father seems to be on the left and the chick on the right.

Signals are sent back and forth. Here, daddy tips his head back and emits a strange sort of cooing call, to which junior responds with spread wings.

It is unclear what message is being communicated here. 

However, the training seems to be successful as the chick does find some grubs. 


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Cooper’s Hawk


It is certainly fun to spot a Cooper’s Hawk along the lakeshore, for I only get to see it about once a year. This is a raptor that mainly preys upon smaller birds. 

Yet, there is something rather odd about my sightings:  I have only ever seen immature Cooper’s Hawks. Where are the adults?

A immature Cooper’s Hawk sits atop a utility pole. 

“Quit watching me while I practice my dance routines.”


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Osprey migration preparation


Around mid-September adult ospreys migrate. They have nested, raised chicks, and sent them off on their own. Now is the time to head south for the winter. However, that requires building up fat reserves by feasting on fish. (Juvenile ospreys migrate separately a few weeks later.)

Earlier in the week, an adult osprey fed in the early morning light. It spent most of its time feeding on the piling with its wings folded. But, occasionally it raised its wings to adjust the position of its fish, and that made for a couple of dramatic shots.


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Spread wings


The explanation for why a bird spreads its wings when flying is obvious: the spread wings aerodynamically support its weight.

However, when a bird is standing or floating on water, its wings are normally, but not always, folded. There seems to be a variety of reasons for a bird that isn’t flying to spread its wings: drying them, warming them, baking parasites, signalling, regaining lost balance, and preparing to fly. 

Although this compilation makes it look as if these postures are frequent, they are not. Two of the images below are new, but previously posted images have been pressed into service to illustrate reasons that wings might be spread while a bird is standing or floating.

During flight, this heron’s spread wings aerodynamically support its weight. However, when a bird is perched, its weight is supported by its legs. What would prompt a perched bird to spread its wings? 

Drying feathers
A compelling explanation for a bird having spread wings when perching is that it is drying its wings. This actually seems to be the case with this Bald Eagle, which had just been fishing for Kokanee in a stream. I have only seen an eagle adopt this pose twice, and on each occasion, the wings were only partially spread.

However, following a bath in the lake, this Bald Eagle stands in the shallows, spreads its wings, and shakes off the water.

Another circumstance occurs after a cool night when the bird warms its wings and body in the morning sunlight. This seems to be the explanation for Turkey Vultures exposing their spread wings to the rising sun.

Baking parasites
A curious case of spread wings is illustrated by this Great Blue Heron: it is exposing its spread wings to sunlight so as to bake the parasites in its wing feathers. Its extended neck, and panting, then cools the blood reaching its head so as to prevent the hotter blood from reaching its brain. 

The balalaika-like pose of the heron is mimicked by a Turkey Vulture, so one suspects that it, too, is baking its parasites.

The above poses can be fairly long lasting. Of somewhat shorter duration are those shown in the next images. The spread-wing posture can be used to signal. This dipper is telling an adjacent dipper to stay clear of its foraging area.

Similarly, this loon is signalling a perceived interloper to move out of its territory. 

These Canada Geese seem to use synchronized spread wings in their courting.

This is one of the ways a male Hooded Merganser signals his interest to a nearby female.

Maintaining balance
When mating, a male osprey spreads his wings both to support its weight and maintain balance.

This is also the case for the mating Tree Swallows. 

Sometimes a perched bird loses its balance when eating and spreads its wings to regain it. Here a Pileated Woodpecker is foraging on elderberries.

And an osprey briefly uses its wings to maintain its balance as it adjusts the position of its fish.

Preparing to fly
This juvenile osprey has yet to fly, but it practices by facing into the wind and spreading its wings.

Finally there is the momentary spreading when an adult bird is still perched, but about to fly. 


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No theme


When I post something to this blog, I like to have a theme — a story to tell. Alas, in the nascent days of September, I could find none. There were many images, but no theme. So, this is just a grab bag of things seen.

A white-faced meadowhawk rests on a leaf between flights.

An Eastern Kingbird expresses its opinion.

A bluet damselfly shepherds its partner to an egg-laying place.

A Turkey Vulture flies low overhead.

A darner dragonfly hunts for insect prey. 

A Warbling Vireo also hunts for insects.

A Grey Catbird rests in a tree.

A sub-adult Bald Eagle passes low overhead. 


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August goulash


This is a collection of images from August, none of which has had a posting of its own.

An osprey flies by with a fish.

Earlier I showed a Solitary Sandpiper. Here is another migrant: a Semipalmated Sandpiper.

In May I posted Western Toads in amplexus, in June copious tadpoles. Now there are toadlets.

This is an oddity: a juvenile Brewer’s Blackbird during its moult.

Usually Turkey Vultures are seen soaring on high. This one was low as it flew past.

The dramatic stance of this Bald Eagle was the transient result of it lifting its wings so as to fly.


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Bears in a tree


A black bear sow and her two cubs have staked out a local creek to fish for spawning Kokanee. Although she has explored the creek, I have yet to see her do so. Rather, I had a view of the family resting overnight in a tree.

OK, as wildlife pictures go, these are marginal, but the family was seen high in a distant tree through other foliage.

Two black bear cubs (seen in silhouette) rest in a tree, one above the other.

Mommy had been higher in the tree, but has now descended.


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Flaws in supporting pictures


This blog bases its postings on recently taken pictures from local nature. Now and then an identification is mistaken and this results in a flawed text. Nevertheless, the picture is correct. 

News sites have the opposite problem. A textual story comes over the line and some benighted picture editor has the job of providing (presumably) relevant illustrations. Sometimes these illustrations are just silly.

Why such text stories are deemed inadequate without an accompanying image strikes me as bizarre, and many of the better news websites do not insist upon it. Yet, many news sites seem to require a gratuitous picture for each story — often one that is merely generic clip art, and now and then one that is misleading. 

Below are two discussions of recent ineptitude on the part of picture editors.

During the recent catharsis in the Manitoba wilderness, the BBC ran a story about the dangers of the locale and illustrated it with a shot of a grizzly bear. Alas, grizzly bears have not been seen in that region for hundreds of years. Someone must have pointed this out to them, for a couple of days later the picture was changed to show a black bear. Here, I show a local grizzly bear, something long gone from Gillam, Manitoba.

A recent story in the New York Times discussed a study of the behaviour of migrating European warblers. However, they illustrated it with a North American Yellow Warbler. Alas, despite the similarity of names, these two warblers are only distantly related, making the illustration irrelevant. Here is a shot of the local Yellow Warbler.


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