Clearwing

 

This has to be one of the neatest bugs ever. It hovers over flowers sipping nectar like a hummingbird, but it looks like a giant bumble bee. It is neither bird, bee, nor fly. Rather, this oddity is a daytime-flying moth with clear wings. Sometimes called a hummingbird moth, sometimes a clearwing moth, the species occasionally seen locally has the name of a Rocky Mountain Clearwing (Hemaris thetis).

I saw this moth on lilacs three years ago and on dandelions four years ago, but I had not found it since then until a few days ago. Curiously when seen, it was foraging on exactly the same few square metres of dandelions where one was seen four years ago. 

Offered without further comment are four views of a Rocky Mountain Clearwing. The final view is my favourite.

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Nest-building styles

 

Birds certainly have a range of both nest-building styles and sites. Sites are usually chosen to be accessible to food, and inaccessible to predators — including humans. Nevertheless, a few species have discovered that human structures meet their needs better than natural sites. I show three styles seen this last week, sticks, moss, mud, but all built on human structures. 

Ospreys eat fresh fish and so a lakeside nest is ideal. I have seen osprey nests back from the water’s edge and in trees, but most ospreys around here have discovered that few sites meet their needs better than a structure humans have erected in the water, such as, dolphins, bridges, and pilings. This osprey has just built its stick nest on a pylon (marking underwater cables) which was erected only last year.

Dippers seem to favour the underside of bridges where they build domed nests of small sticks and moss This site has been used before, but in the spring it gets rebuilt. The site over a raging stream is beautifully protected from land predators, while the bridge deck fends off rain and diving falcons. When the nest is completed, there will be a small opening on the side (see last year’s pictures of the same site: dipper nesting, dipper chicks). The dipper on the left has flown in with a beak full of moss. A second dipper inside the nest appears to be tamping moss around what will become the small opening.

Cliff Swallows once built their nests on cliffs, but have discovered that buildings and bridges work beautifully and even offer overhangs to protect them from the rain. These swallows build their nests out of about a thousand mud pellets which are first fashioned and then carried to the site individually. These nests are under reconstruction.

Here a Cliff Swallow is about to place another mud pellet.

The swallow that was working on the nest’s interior is now flying off for more supplies while the other one is tamping a pellet in place around the nest’s opening.

“Hey, you down there, hurry up with that mud; we have a schedule to keep.”

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Sky line

 

The title is not a typo: this is about a sky line, not a skyline. The last time I saw a nice example of this was three years ago: sky lines. This posting is an adaptation of what I wrote then, but with the current picture.

A white line across the sky is easy to interpret: a contrail (a trail of condensation from aircraft).

What about a dark line across the sky, such as seen here? This line also results from a contrail, but indirectly. Here, the contrail is above the clouds and not visible, but the shadow it casts on a lower cloud traces a dark line across the sky.

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Magpie preferences

 

Magpies are smart. Indeed, the Eurasian Magpie, a species virtually indistinguishable from our own Black-billed Magpie, is the only bird to have ever passed the mirror test, a self-awareness test whereby it is seen whether an animal is able to recognize its mirror image as being a representation of itself. 

While rare in the West Kootenay, magpies are common in the Okanagan. 

In what might be considered a touristic promoter’s dream, one might take this to imply that really smart birds prefer the area around Okanagan Lake to that around Kootenay Lake. Alas, the magpie has a bias towards open habitats with occasional trees rather than forests. Humans have more cosmopolitan tastes and some prefer forested landscapes.

So, Kootenay Lake gets the odd magpie, but only in those few regions where open farmlands prevail. 

I took this picture a while ago and reserved it until I needed to illustrate the forested nature of the lakeshore. It is now appropriate: most of Kootenay Lake is just not hospitable to magpies.

A few spots (at each end of the Main Lake and the region around Harrop and Procter) have the adequately open country that magpies favour. This magpie was observed in Harrop. I had thought of the magpie as essentially black and white until I took this picture and saw the colour in its plumage.

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Small fliers

 

Recently, I wrote about the difficulty of taking a picture of a Spring Azure in flight. The motivation was to capture the lovely blue upper wings that become apparent during flight. However, capturing a close image of any insect in flight is not easy. Here are a few recent successful flight shots of fellow lakeside inhabitants. 

I start with a shot of the Spring Azure as it flies toward a group of lilac buds.

Also a challenge was a Bombylius major as if flies toward a group of forget-me-nots. The bombylius is a springtime flier that mimics a bumble bee as a way of avoiding being eaten by birds.

The Drone Fly is so named because it mimics the drone of the honeybee. Indeed, this guise has not only confused birds, but for millennia, it has confused humans. Here it is flying between dandelions. 

This is the European Paper Wasp, an invasive species that has been in our area for about a decade. It is easily identified in flight by the fact that it leaves its hind legs dangling. 

This grub is certainly up in the air, but it soon went flying for real, but inside the Chestnut-backed Chickadee.

A wasp with a fearsome reputation is the Bald-faced Hornet. I have found that if I merely watch, but don’t challenge, it, I can take whatever pictures I wish.

This may look somewhat like a Bald-faced Hornet, but it is an innocuous female Pied Hover Fly (Scaeva pyrastri). Its markings are clearly another attempt to persuade birds that it is far more deadly than it really is.

My most detailed shot of a small flier is of a male Pied Hover Fly. It is one of those pictures that one probably could not set out to take, but might capture inadvertently.

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Red-naped Sapsucker

 

As I look through my old pictures, I realize that I only see a sapsucker every couple of years or so. Consequently, yesterday’s sighting was fun. Actually, it started with two of them sitting on a branch, but one promptly flew.

The bird that remained on the branch appears to be a female Red-naped Sapsucker.

“Our bestiary tells us that humans are confined to the ground so that we can look down upon them.”

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Rufous Hummingbird

 

Folks to the north and south of me have already seen their first hummingbirds of the year. Indeed, for the last week, I too have seen some, but this is the first one I managed to photograph. 

A male Rufous Hummingbird arrives at my home.

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Crane Fly mating

 

As I wander about the yard watching the progress of spring, I ofttimes have seen the frenetic flight of Giant Crane Flies, but my photographic skills were not able to match their rapidity. 

I managed a picture of one last year, which enabled a discussion of its gyro stabilization. So far this year, nothing seemed to slow them — nothing, that is, until two of them settled down together.

Giant Crane Flies mate. The female is on the upper right.

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Sunrise

 

I was admiring a picture that Derek Kite had taken from high on a ridge above the West Arm. It showed the sunrise over the distant Purcell Range. I wondered if I could capture a similar moment and went out early this morning to try. 

The picture I obtained is characterized by colour and tranquility. However, also seen are a bit of the Main Lake, the Harrop Ferry, and (near the shore in the middle left) the disturbed water that has resulted from katabatic winds.

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Fairy Slippers

 

The bee knows. 

Yesterday in my yard, I saw pollinia on the thorax of a bumble bee. As far as I know, the only flowers around here that produce these pollen packets are orchids, and the wild orchid that is earliest to appear is the Fairy Slipper (Calypso bulbosa).

This morning I visited my favourite viewing spot (two kilometres away as the bee flies), and there they were — dozens of them. They were about three weeks earlier than I have noticed them before. (Two of this morning’s pictures, below.)

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