Mission: To promote the appreciation of wildlife and increase harmony between humanity and nature.

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Saturday, August 12, 2017

Smoke and Ash

On Thursday, I was lucky enough to catch Lacey returning to the nest in the Union Bay Natural Area (UBNA). Lacey is the mother of these two young osprey who are getting close to leaving the nest for the first time.

Young osprey have orange irises while adults have yellow. At a distance, the difference can be difficult to detect.

As we zoom in, you can also see that Lacey, on the left, is visibly larger. Her head and especially her beak are clearly bigger than those of her offspring. You might also notice that she, and other adults, have no pale edgings on the tips of their dark feathers.

If we desire to live in harmony with the wild creatures it is important to watch for unintended human impacts on their behavior. To do this we need to be paying close attention to what is normal for our avian neighbors. Which is part of why I like to try to get to know and identify each bird as an individual.

Here is a close up of our two new 2017 UBNA osprey neighbors. I am calling the bird on the left, Ash, and the one on the right, Smoke. Their names are in part inspired by all the smoke we have been getting from the British Columbia forest fires. Their coloring also plays a part in their names.

If you look closely at their foreheads you can see that Ash has a predominantly white forehead while Smoke's forehead is much darker. Kathy Hartmann also noticed a couple of even more subtle differences. All of Smoke's dark feathers seem to be a deeper shade of brown and his irises may look slightly more yellow.

By the way, Kathy just wrote a very nice piece about me and harmony with nature. It is in the latest publication from the Washington Ornithological Society. To read it Click Here and then scroll down to page eight. Thank You Kathy!

Lately the young birds have been spreading their wings and...

...lifting up into the air.

I have not actually seen them leave the nest and fly, but it could happen any time now. If my latest calculations are correct, the older one should fledge (take its first flight) within the next week.

Another difference between the young and the adults is the beige or buff coloring on the young. The adults have none. You can see some of the 'buffy' coloring below Smoke's neck, on the underside of the wing and (in the previous photo) on the back of Ash's neck when the wind blows up his 'ruff'.

This photo nicely exposes the underside of Smoke's primary flight feathers. The ten longest feathers at the end of each wing tend to push the osprey forward in flight while their shorter secondary feathers provide more lift. The highest points in Smoke's wings are essentially his wrists. Having the primaries attached at or after the wrists provides optimal control. Think about how much more control you would have of feathers attached to your fingers versus feathers trailing off of your forearms.

In this photo Smoke is clearly twisting his wrists and actively modifying the angle of his primaries. I suspect he is dumping air in order to settle down on the nest with finesse and control. I am assuming these two young are both male because their chests do not show much in the way of a dark necklace like their mother. In adults, the lack of a necklace generally indicates the bird is male. Among the young, the coloring is said to be a somewhat less reliable indicator. I could be wrong.

Adult female osprey can be as much as twenty percent larger than males, so we could also look for hints in their size. Although I suspect birth order may impact the size of the young, as much or more than gender.

It was obvious that Lacey settled into the nest with a particular goal in mind. When excited or nervous, Lacey becomes quite verbal. Her calling normally indicates the approach of a potential predator or the return of her mate, Chester.

The young are developing a healthy interest in the world around them, and they were obviously concerned about who was approaching the nest.

Luckily this time it was their father Chester, coming in with a fish.

Although Chester is smaller than Lacey, nobody wants a wing in the face so everybody ducks. 

This photo also shows how the osprey's flight feathers are mostly dark on the upper side and mostly barred on the underside. The exceptions are the last 3 or 4 primaries, P7 through P10, which become progressively darker on the underside. The book 'Bird Feathers' by Scott and McFarland says, 'Melanin (which makes feathers dark in color) is also associated with keratin, which provides structural integrity.' This seems logical given how useful the last few primaries are in controlling flight, gliding and landing.

No sooner did Chester land in the nest with the fish than Lacey picked it up.

Lacey was evidently aware that everyone else in the nest was well fed. None of them voiced any objections as she retired to a nearby cottonwood for a late breakfast of Union Bay sushi. 

Here you can see her leading primaries are stretched apart like fingers as she glides. My understanding is that the separate 'fingers' break up the air into a number of small individual vortexes. The result is less drag and more lift. I suspect as airplanes become more sophisticated we will see similar adaptations.

After eating, Lacey came back and seemed to consider landing in the nest. Notice how she used her tail to slow her progress. In addition, her wing feathers are all askew. No doubt this reduced lift, as the feathers were not aligned and all working toward a common goal.

At the last moment she apparently changed her mind.

A split second later her feathers were perfectly aligned and working together. Lacey lifted back up into the sky and returned to her cottonwood roost where she could watch the nest from a short distance away.

I remember someone who passed by wondering if Lacey was behaving like the mother of young children who occasionally locks herself in the bathroom for a moment or two of peace and quiet. Parenting is demanding, regardless of your species.

In parting, here is a photo of Smoke snoozing in the morning sun. I wonder if there is a logical reason why osprey have white eyelids? Shelley, my wife, suggests that maybe the white eyelids make it look like they have their eyes open even when they are sleeping.

If you would like to see one of the earliest 'baby' photos of Smoke or Ash following This Link and look toward the end of the post. The photo from Doug Parrot shows one of the very young birds. Look closely - just below Lacey's neck.

Have a great day on Union Bay...where young osprey are once again preparing to fly!

Larry

PS: Here is a fun link to a video which Bill Albert sent in. It shows an osprey diving into Portage Bay for a fish. It could very well be Chester! Click Here to see Bill's video.

Going Native:

Without a well-funded Environmental Protection Agency, it falls to each of us to be ever more vigilant in protecting our local environments. Native plants and trees encourage the largest diversity of lifeforms because of their long intertwined history with local, native creatures. I have been told that even the microbes in the soil are native to each local landscape. My hope is that we can inspire ourselves, our neighbors and local businesses to plant native flora and to support native wildlife at every opportunity. My intention is to include at least one photo each week and visually challenge us to know the difference between native and non-native lifeforms.



I am hoping that this week we can reverse roles. Can anyone tell me whether this creature is a native or not? In the first photo, and in many others I took, this insect uses its proboscis to dip into multiple tiny flowers. In the last photo it rolls up its proboscis into a very artistic swirl. Given that moths and insects are not part of my expertise I am hoping someone will tell me whether this in a native creature and if possible maybe even identify it. Thank you in advance for any help you are able to provide.





Tuesday, August 8, 2017

Some Like It Hot

Lately, I have found the weather to be a bit too hot. Last Tuesday while watching a young great blue heron, I heard an alarm call. A moment later, two birds hurriedly took flight. The heron and I watched as a river otter swam out of the shadows.

My last otter sighting was in Spring. Both times I was standing on the shore of Foster Island and looking at virtually the same location in the water. In the Spring, I suspected the otter was searching for freshly laid duck eggs. This time I wondered if the otter was hoping to sneak up on an adult mallard. Most of the mature mallards are currently unable to fly, while they are growing new wing feathers. The otter quickly left the heat and bright light of the sunshine and swam back into the shadows.


I was surprised by how quickly the heron went back to hunting. It did not seem to be worried about the otter. Hunger must have a real focusing effect.

As I was leaving Foster Island I noticed a couple of dragonflies basking in the sunshine. They were both Eight-spotted Skimmers. Evidently, the name comes from counting only their black spots. They made me think of the merlin which I saw the week before in the top of a near by tree. 

Last week, Barbara Deihl sent me an email about this merlin. Merlins are one of her favorite birds. Barbara explained that a blue eye-ring, a blue cere - the area at the base of the beak - and a short tail can indicate a young merlin. Plus, the protruding crop - the bump where the neck should be - indicates that this bird had recently fed. Barbara suggested that the most likely food for a young merlin would be dragonflies. That seemed particularly likely since this merlin had been sitting above Duck Bay.

Evidently these Duck Bay dragonflies were a bit faster than the ones the merlin had caught. In any case, as long as there was no immediate danger the dragonflies seemed quite happy sit in the heat of the sun.

The next day I spotted a couple of cold-blooded turtles by the large pond at the south end of Azalea Way. They were sitting on the concrete wall along the edge of the pond while basking in the sun. When the weather is warm, turtles become more active. These two were certainly flicking their heads from side to side much faster than I had ever seen before.

By the way, The Seattle Garden Club is building a new garden just to the north of the pond. The garden is to help celebrate their 100th anniversary. They have installed a new stone wall which is set back from the pond but at a complimentary angle. It looks very nice, I will be excited to see how the garden looks once all the new plants arrive. I hope the plants provide blossoms and fruit which attract lots of birds, bees and butterflies.

On Thursday and Friday, the weather felt even hotter and the air smelled from the smoke of Canadian forest fires. On Friday morning I spotted this female flicker just sitting on the ground in the shade. She wasn't even feeding. It looked like she had simply found the coolest spot around and had decided to wait out the heat.

I hiked all the way to the north half of Foster Island before I saw another bird. Just as I walked out from under the new freeway I saw this crow cleaning and preening while sitting in the full heat of the sun. I wonder if crows have some type of special heat regulating system.

As I neared the water of Union Bay, I heard a young crow calling for food. The incessant cry was annoying. It made me wonder how the parents could possibly stand it, especially with all the heat, smoke and noise of the preliminary Seafair party flotilla. 

Out on Union Bay there were plenty of boats, but the only water birds I could see were Canada Geese. If I had to pick two avian species which would thrive, in spite of global warming, I think I would bet on American Crows and Canada Geese.

As I turned toward home and walked under the new bridge, I noticed this great blue heron in the distance. It was standing in the water and mostly in the shadow of the bridge. I wondered if it was using the shade to avoid the heat.

A few steps further on I spotted this young robin. The spots on its chest indicate its youth. Unlike the young crow, the robin was waiting quietly for a parent.

A moment later the adult showed up. I suspect most birds feed in the cool of the morning and by the time I was up and out they were simply sitting quietly in the shade like the robin, the heron and the flicker.

I did find one other avian species which was active in spite of the heat. Can you see the bird in this photo? I must admit I have the advantage of having watched it arrive at this location. The brown creeper is directly below the largest leaf on the right.

While I watched, the creeper moved up to feed on something in this knot hole.

A moment later there were at least two and maybe three creepers flittering about. In their usual manner they fluttered down to the base of the trees and then worked their way up searching for food. 

They worked mostly in the shadows, obviously unfazed by the heat. It looked like one of the creepers was an adult. My clue to its age came from what appeared to be a full-sized youngster who began chasing the adult - non-stop. The adult was basically unable to hunt because of the constant pressure. Up the tree they would go, one after the other. If it had been earlier in year I would have thought it was a male chasing after a female. But this time of year it seemed more likely to be a parent and its young. As soon as the adult tried to fly down to the base of the next tree, the youngster would take to the air. Like a little brown 'blue angel' it would fly right on the tail of the older bird. I never did see any exchange of food. It looked to me like a self-defeating process for the youngster.

Over a hour had passed since I first saw the female flicker sitting in the grass. On my way back I stopped by the same spot and sure enough there she was, still sitting in the shade. She was apparently happy just to wait for the heat to pass.

I put my camera away assuming that most birds were taking it easy and I was not likely to see many more. I headed towards home thinking how nice a cool shower would feel. Sadly, I was wrong about the birds. 

Just a hundred feet before leaving the Arboretum I heard an indignant Stellar's Jay crying out. It was being chased by a young Cooper's Hawk. When the jay momentarily landed in a conifer, the young hawk also landed and chased it through the branches. The two birds cork-screwed up and around the tree with the jay expressing obvious frustration. The jay finally escaped to the north and they both escaped being photographed since my camera was out of reach.

I hope you are finding a way to enjoy the heat!

Have a great day on Union Bay...where nature lives in the city!

Larry

Going Native:

Without a well-funded Environmental Protection Agency, it falls to each of us to be ever more vigilant in protecting our local environments. Native plants and trees encourage the largest diversity of lifeforms because of their long intertwined history with local, native creatures. I have been told that even the microbes in the soil are native to each local landscape. My hope is that we can inspire ourselves, our neighbors and local businesses to plant native flora and to support native wildlife at every opportunity. My intention is to include at least one photo each week and visually challenge us to know the difference between native and non-native lifeforms.









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Scroll down for the answer

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This is Devil's Club. It is a native plant which loves wet and shaded spots. The leaves can be over a foot in diameter, the stalks can reach above your head and the thorns can make you see red. 

The existence of Devil's Club usually indicates you are in reasonably undisturbed Pacific Northwest habitat, often in the shade of the forest and near water. I suggest you enjoy the environment without allowing yourself to come in contact with this plant. The thorns can be nasty.