A Gift to the Future

Around Union Bay, mature Red-tailed Hawks generally have rufous colored tail stripes, which validate their name. 

Immature Red-tails lack this coloring as mentioned in Seattle Audubon's Birdweb. This distinction seems to be fairly reliable in our area, however, Birds of North America mentions that there are as many as 16 subspecies in the Americas. Depending on where you visit (and where the Red-tails visit) you may see a wide variety of tail, chest and body colorings. Click on All About Birds to see some of the various subspecies. Luckily, (or not) we get mostly the common colored Red-tails in Seattle.

Curiously, even with mature birds, the underside of the tail is generally lighter.

Waiting for a soaring bird to give you a peek at the topside of its tail can require patience.

Bud Anderson taught me, that another generally common identifying characteristic for a Red-tailed Hawk is its indistinct belly band. When you add in their normally dark heads, especially as compared to the chest, I think this creates the overall impression of a white bib. I imagine the bib all tucked in and the hungry hawk just waiting to eat. The same All About Birds photostream shows that the bib is not universal, but I find it generally exists on our Union Bay Red-tails. 

Another key identifier, which I learned from my friend Marcus Roening, is that at a distance a Red-tail looks like a football. It does not matter if it is sitting in a tree, on a telephone pole or on the horizontal support for a freeway light.

Last week, when I heard the distinctive sounds of American Crows harassing a predator I was lucky enough to locate this handsome bird. It quickly relocated to this position above the 520 off-ramp, near the Montlake grocery store - the one previously known as Hop-In. 

(Sadly, due to the 520 Freeway improvements, this historic store will only exist through the end the month.)

Flickering back and forth between this and the previous photo will give you an impression of the subtle triangulating movements which predatory birds use when zeroing in on a potential target.

Sometimes Red-tails will soar but often they simply sit and wait for prey to expose themselves.

They are smart, flexible predators who do not care what type of meat is on the menu. They like rats, rabbits, mice, snakes, squirrels, birds or fish. They will eat them fresh, steal from others or consume leftovers - no refrigeration required. I suspect their taste for leftovers may be part of the reason Red-tails can often be found peering down over freeways.

They love to hunt from a perch with nice open views and easy access. The grass beside our freeways provides food and shelter for several potential prey species - very similar to a field spread out below a horizontal tree branch. Red-tails readily adapt to human-altered habitat as long as it meets their needs.

Red-tails are not the only bird species that have benefited from our habitat modifications. American Crows are smaller and probably smarter. The crows respect a Red-tail as a dangerous predator and will generally attempt to drive it out of their territory.

Last spring, I watched this Red-tail get driven out of the Union Bay Natural Area. You can see from the way its head is reversed, by 180 degrees, that it was intimidated by the crow's attack.

Last month, I saw a similar situation immediately north of 520.

Again, the crows prevailed.

Last week, the crows continued their constant harassment. 

Ultimately, the Red-tail left the light post.

It moved to a nearby telephone pole before finally evacuating the area altogether.

The natural creatures we find in the city are a direct result of the habitat we create or enable. We have an abundance of crows because our yards, commercial establishments, and often our garbage, provide a surplus of food for them. By working to restore the quality of our yards (see Going Native below) and our waterways we will be giving the gift of wildlife to future generations of city dwellers.

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A special Thank You goes to retiring Council Member Larry Gossett. Mr. Gossett championed the Friends of Arboretum Creek's (FOAC) grant request, 

"Alder Creek to Arboretum Creek - 30% Design". 

With Mr. Gossett's guidance and support last week the King County Council approved the FOAC funding request. 

Thank You, to each of you who wrote letters requesting the Council's help.

This next phase of the project will provide a critical design foundation for future restoration efforts in and along Arboretum Creek. This will help, "Maximize the diversity of life in Arboretum Creek...while rekindling the love affair between Seattle and nature." (Click on the golden highlight above to learn more.)

Thank you to everyone involved, and especially, Dave Galvin. Dave has been involved, supportive and devoted to this project from the very start. He has contributed countless hours to the idea of restoring life in this urban stream. Thank You!

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Update:

Thank you to Dennis Paulson for forwarding this link to a concise and thoughtful review of the types of bird habitat in critical need of restoration.

https://thehill.com/changing-america/sustainability/465203-our-nations-declining-birdlife-can-be-brought-back-heres-how

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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 our local environment and native creatures. I have been told that even the microbes in the soil are native to each local landscape. I hope we can inspire ourselves, our neighbors and local businesses to respect native flora and to support native wildlife at every opportunity. I have learned that our most logical approach to native trees and plants (in order of priority) should be to:

1) Learn and leave established native flora undisturbed.

2) Remove invasive species and then wait to see if native plants begin to grow without assistance. (If natives plants start on their own, then these plants or trees are likely the most appropriate flora for the habitat.)

3) Scatter seeds from nearby native plants in a similar habitat.

4) If you feel you must add a new plant then select a native plant while considering how the plant fits with the specific habitat and understanding the plant's logical place in the normal succession of native plants.

My intention in my weekly post is to include at least one photo each week and visually challenge us to know the difference between native and non-native lifeforms. 

Is this fruiting plant native to Union Bay?

Scroll down for the answer.

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Black Twinberry: Yes, it is a native plant. Click on the name to read more about how it can be used in your yard and then scroll to the bottom to see a list of birds that appreciate its fruit.

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The Email Challenge:

Over the years I have had many readers tell me that Google is no longer sending them email announcements regarding my posts. Even more frustrating when they go to 're-sign-up', hoping that will enable them to once again start receiving the announcements, they get a message which says 'Sorry, you are already signed up.' Google has not responded to my requests for help with this issue. 

My functional workaround is to set up my own email list and each week I manually send out a new post announcement. If you are experiencing the issue and would like to be added to my personal email list please send me an email requesting to be added. Thank you for your patience!

My email address is: LDHubbell@Comcast.Net

Recommended Citation

Preston, C. R. and R. D. Beane (2009). Red-tailed Hawk (Buteo jamaicensis), version 2.0. In The Birds of North America (A. F. Poole, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bna.52

The Bum Deal

Mallards are the most common of all duck species in North America, according to All About Birds.

This post focuses on a selection of twenty duck species found around Union Bay. The group of twenty is divided evenly into ten dabbling duck and ten diving duck species. In particular, we will be looking at the rear view of the male ducks in breeding plumage. 

Mallards dabble. You might imagine that they perceive life as a buffet filled with a variety of delicious delicacies. Given that they are the largest and most common of the dabbling ducks you might suspect they are bullies who paddle around and try a taste of anything and everything they want. You might be right. They are the only species I have seen eating crabapples off a tree on Foster Island.

However, that is not why they are called dabbling ducks. The dabbling description is related to their inverted feeding style. With their legs attached at 'mid-ship,' they can paddle quickly, walk adequately and, critical for dabbling, they can easily hold their 'upper' body below the surface while feeding in shallow water. However, the placement of their legs is not very useful for diving.

Buffleheads are one of our most common diving ducks. Their legs are attached near the back of the body, just in front of the tail. Their webbed feet function like flippers on a diver and greatly enhance their underwater mobility. As a result, they swim and dive superbly, although they seldom dabble and walk rather poorly.

Diving ducks also have relatively longer tails. I suspect they utilize their tails below the surface in a manner somewhat similar to a Cooper's Hawk. When a Cooper's Hawk flies through a forest, their long tails help them to twist and turn to avoid obstructing branches, to match the agility of their prey and to elude predators.

Similar to the Mallard in the first photo, a Gadwall is another dabbling duck with a dark bum. In both cases, they also have a few light tail feathers which seem even brighter against the surrounding darkness. After years, of watching male dabbling ducks, I finally noticed that most of them have black butts. The sudden realization sparked questions. Do all male dabbling ducks have dark bums? If so, what purpose do they serve?  What about the diving ducks? Do they have dark, light or a variety of bum colors?

One of my first thoughts was remembering that Dennis Paulson taught us that dark feathers are more durable than white ones. That seemed like a logical reason for the dark bums but then why do they have white highlights? Why not just solid black bums?

A Northern Shoveler is another dabbling duck with a dark bum and few light highlights. Among the dabblers, shovelers are the most dignified. They generally 'snorkle' about in circles with their bills below the surface while their bodies remain horizontal. 

Green-winged Teals do have even larger white highlights but the background color of their bums is still dark. Blue-winged Teals have smaller highlights but more extensive black bums. You can see an example on All About Birds by clicking the blue highlighted text.  

 Cinnamon Teals have dark bums...

...as do the Northern Pintails.

American (and Eurasian) Wigeons are Union Bay dabblers with black butts.

Even the more distantly related Wood Ducks, who I suspect just barely belong to the dabbling duck society, have dark bums. Their hind feathers are similar in color to their chests but noticeably darker than their sides and their white highlights. All ten of the most common, male dabbling ducks on Union Bay have dark bums in breeding plumage. 

My friend Dave Galvin suggested the dark bums might make them less conspicuous to airborne predators. Camouflage certainly seemed like a plausible concept.

However, with so many light feathers surrounding the small black bums, the stark color difference seems like it would attract attention. If memory serves, I believe the underside of most male dabbling ducks is light in color creating this similar situation.

At this point, in my research, I was very curious about the color of the diving duck bums. I learned that Ring-necked Ducks have black bums.

As do, Lesser Scaups...

...the Canvasbacks and the somewhat similarly patterned Redheads.

On the other hand, the Hooded Mergansers have a lighter colored bum...

...as do the male Common Mergansers...

...and the male Ruddy Duck and the Bufflehead which we saw earlier. This leaves the count among the diving duck species at four dark and four light bums.

A glance at the Barrows Goldeneye and the ...

...closely related Common Goldeneye initially convinced me that they have dark bums. Which would make the count six dark bums out of the ten Union Bay diving duck species.

Luckily, I stumbled across this photo. Male Common Goldeneyes do have a dark tail but their bums are white. I do not have a similar photo of a Barrow's Goldeneye, but I suspect their bums may also be light. The bottom-line on the color of diving duck bums is apparently about fifty-fifty. 

Finding photos of diving duck bums was much harder. Ultimately, I realized that when they are on the surface their tails are usually at or just below the surface, so their bums are hidden to human eyes. Also, they dive quickly. During the diving process, their bums disappear in flash. Plus they are often encircled by a splash of the water. This led me to conclude that the color of a diving duck's bum may have little or no impact on their top side lives. Although having a completely light underside may be an example of countershading which may help make them less visible to aquatic lifeforms.

In a surprising observation, five of the six diving duck species with white bums are cavity nesters e.g. both Goldeneyes, both Mergansers and Buffleheads. The only exception is the Ruddy Duck. Since only female ducks enter the nesting cavities, as far as I have seen, and only the males have the light-colored bums I cannot conceive of any logical reason for this correlation. I would love to hear about your thoughts and ideas.

On the other hand, the consistent dark color and constant exposure of the ten male dabbling duck bums makes me suspect the darkness serves a useful purpose. Not only are dabbling duck bums exposed while they are feeding they are also obvious when paddling about on the surface. In essence, their bums are exposed nearly all of the time. Plus, many of the species have contrasting light-colored highlights which most likely draws attention to their bums.  My best guess is this flashy arrangement functions as a signal to other males of their species. 

I suspect it informs competitors that the nearby female has a mate, even if the male mate has his head underwater, or if his back is turned. During breeding season an approaching male is unlikely to mistake a mated pair for two unaccompanied females. This idea is my best guess at explaining dark bums on male dabbling ducks. If you think of a more logical explanation please let me know. In any case, Thank You for following along!

Have a great day on Union Bay...where male dabbling ducks moon the competition.

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 our local environment and native creatures. I have been told that even the microbes in the soil are native to each local landscape. I hope we can inspire ourselves, our neighbors and local businesses to respect native flora and to support native wildlife at every opportunity. I have learned that our most logical approach to native trees and plants (in order of priority) should be to:

1) Learn and leave established native flora undisturbed.

2) Remove invasive species and then wait to see if native plants begin to grow without assistance. (If natives plants start on their own, then these plants or trees are likely the most appropriate flora for the habitat.)

3) Scatter seeds from nearby native plants in a similar habitat.

4) If you feel you must add a new plant then select a native plant while considering how the plant fits with the specific habitat and understanding the plant's logical place in the normal succession of native plants.

My intention in my weekly post is to include at least one photo each week and visually challenge us to know the difference between native and non-native lifeforms. 

Is dark-bummed dabbling duck native to Union Bay?

Scroll down for the answer.

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Eurasian Wigeon: As the name makes clear Eurasian Wigeons are not native to Union Bay, the Pacific Northwest or North America. They come here from Siberia, according to Seattle Audubon's free online application e.g. Birdweb. It is always fun to scan a large flock of American Wigeons and then suddenly spot the striking head of a Eurasian Wigeon.

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The Email Challenge:

Over the years I have had many readers tell me that Google is no longer sending them email announcements regarding my posts. Even more frustrating when they go to 're-sign-up', hoping that will enable them to once again start receiving the announcements, they get a message which says 'Sorry, you are already signed up.' Google has not responded to my requests for help with this issue. 

My functional workaround is to set up my own email list and each week I manually send out a new post announcement. If you are experiencing the issue and would like to be added to my personal email list please send me an email requesting to be added. Thank you for your patience!

My email address is: LDHubbell@Comcast.Net

Thankful

No doubt Bald Eagles are thankful for their food. Around Union Bay, American Coots are much more plentiful than Wild Turkeys. Plus, the Coots are a more appropriate size for Bald Eagles to catch, carry and consume.

I am not sure that most people realize how thankful we should be to have Bald Eagles for neighbors. On Thanksgiving Day, Ed Deal, from the Urban Raptor Conservancy, sent the following email. "...today I'll be offering up a toast to a great man who passed away yesterday. As you all know (or should know), William Ruckelshaus was the first Director of the EPA, who enacted the ban on DDT against significant political pressure...' Ed also sent the following link.

Click Here for a brief NPR update regarding William Ruckelshaus.

Previous to the ban, DDT was widely used. It bioaccumulated, which was particularly damaging to raptors. It weakened their eggshells and caused them to break before incubation could be completed. The numbers of Bald Eagles and raptors, in general, plummeted in the United States. No one I have spoken with remembers Bald Eagles around Union Bay in 1972. At that time, there were around 100 nesting pairs left in Washington state and less than a thousand in the lower 48 states. By 2014, forty-two years after the ban began, there were over 13,000 nesting pairs in the lower 48, more the 800 pairs in Washington and two nesting pairs on Union Bay. 

Thank you, Mr. Ruckelshaus!

In 2017, a third-pair of Bald Eagles moved into the southwest portion of Union Bay. They built their nest at the southeast corner of Montlake Cut. Their new territory included Portage Bay, Montlake Cut, and Marsh Island, which explains their names, Monty and Marsha. I believe, they are living examples of the continuing raptor recovery from DDT.

Monty bringing a branch to the pair's first nest on Montlake Cut

I suspect that in 2017 Monty and Marsha were a newly mature pair of Bald Eagles, e.g. approximately 5 years old - since they started their nest from scratch. By the way, Bald Eagles mate for life and can live for decades.

This is Monty placing one of the first sticks in the nest.

By January of 2018, the nest was beginning to take form. Among raptors, the females are larger. In this photo, Marsha is on our right and Monty is on the left. 

In Marsha's case, if you look closely you can see she has a gray smudge behind her eye. It is particularly apparent in the very first photo in this post. In the second and third photos, you can see that feathers behind Monty's eye are a brilliant white. Also, Marsha has a much heavier 'eyebrow' than Monty. Take a look at the next two photos and see if you can tell which is Monty and which is Marsha.

A)

B)

The first photo is Marsha and the second is Monty.

In 2018 Monty and Marsha had their first two offspring. This is Marsha in the nest with their two young, Charlie and Lucy.

As the young grew the new nest experienced issues. A branch broke, one of the young ended up on the ground. It was injured and unable to fly. The second young bird continued moving about in the remains of the nest and ultimately the nest disintegrated and the second young bird ended up on the ground and also unable to fly. Both of the young were rescued and spent time at PAWS before ultimately being successfully released.

In 2019, Monty and Marsha constructed a new nest in the same tree. It was slightly lower in the biggest crotch in the tree. Once again they had two young. 

This time the branches remained intact, although one of the young ended up on the ground again, and unable to fly, but at least uninjured. The juvenile bird was also recovered by PAWS and successfully released nearby. Monty and Marsha resumed feeding it and everything turned out fine for the family. Except, that once again the nest slowly broke up and by the time the young left home the nest was virtually gone.

Just before Thanksgiving, Monty and Marsha began rebuilding again.

Currently, the nest is more crow-sized than eagle-sized. However, the pair is building in the same location as last year. No doubt by March the nest will be large enough to hold their eggs and their 2020 young. Whether the nest will last until the young fledge is open for debate. Monty and Marsha are committed to their territory and their nest site. The technical term for their commitment is site-fidelity.

It warms my heart to watch Monty looking through the treetops while searching for the next branch to add to their 'new' nest.

New life is inspiring, amazing and beautiful. However, if the Bald Eagle recovery is to continue we need to follow in Mr. Ruckelshuas' footsteps. We need to mitigate the impacts of humanity's expansion. The next limiting factor to Bald Eagle recovery is most likely food.

Marsha (pictured here), Monty and all Bald Eagles, also love fish as a food source. To enable the full recovery of our Bald Eagle population we need to continue to restore water and fish habitat. The local restoration of habitat is critical. However, Union Bay is an interconnected piece in a much larger puzzle. Restoration is needed throughout the Lake Washington watershed and in Puget Sound. 

Monty and Marsha are either the smartest or the luckiest pair of Bald Eagles in Seattle. Their choice to carve out a territory and nest over Montlake Cut puts them above a narrow span of water through which all migrating fish must pass, to enter or exit the Lake Washington watershed. I am thankful Monty and Marsha are finding food, rebuilding their nest and raising young. They are doing their part to aid the Bald Eagle recovery. The question is, 'Are we?'

The following are some of the organizations which are helping.

Friends of Arboretum Creek

Long Live the Kings

Wild Fish Conservancy

A Thankful Update:

Jerry Pinkepank responded to this post with the following comments.

"We should add to that thanks to Rachel Carson (I note that there is a small research ship moored at UW that now carries her name). Her Book, Silent Spring, set in motion the political will that enabled Mr. Ruckelshaus to get his regulation through. My mother was somehow very aware of the dangers of DDT even to humans and in the 1950's a neighbor boy and I would hurriedly pick the pie cherries of the big tree in that neighbor's back yard, just ahead of the B-17 spraying DDT over the entire city of Lansing, Michigan to combat mosquitoes. After the plane had passed she would not allow me to pick or eat any of those delicious cherries for the rest of the season. -- Jerry"

The Rachel Carson is the larger of the two vessels.

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 our local environment and native creatures. I have been told that even the microbes in the soil are native to each local landscape. I hope we can inspire ourselves, our neighbors and local businesses to respect native flora and to support native wildlife at every opportunity. I have learned that our most logical approach to native trees and plants (in order of priority) should be to:

1) Learn and leave established native flora undisturbed.

2) Remove invasive species and then wait to see if native plants begin to grow without assistance. (If natives plants start on their own, then these plants or trees are likely the most appropriate flora for the habitat.)

3) Scatter seeds from nearby native plants in a similar habitat.

4) If you feel you must add a new plant then select a native plant while considering how the plant fits with the specific habitat and understanding the plant's logical place in the normal succession of native plants.

My intention in my weekly post is to include at least one photo each week and visually challenge us to know the difference between native and non-native lifeforms. 

What type of tree are the Montlake Bald Eagles nesting in? Is it native to Union Bay?

Scroll down for the answer.

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Black Cottonwood: Cottonwood is native to Union Bay. It not particularly appreciated because of its weak lumber. However, it is the primary tree in which our local Bald Eagles nest. Its supple branches are their primary nest-building material. Its seeds are often the initial food for Mallard ducklings, fresh out of their eggs. Plus, bees are known to collect the trees sticky sap-like substance because it repeals pests in their hives. Beavers use it to build their lodges. Plus, woodpeckers and even chickadees have been seen using the dead standing trees for nests and roosting spots. Cottonwoods are critical to our co-existence with nature.

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The Email Challenge:

Over the years I have had many readers tell me that Google is no longer sending them email announcements regarding my posts. Even more frustrating when they go to 're-sign-up', hoping that will enable them to once again start receiving the announcements, they get a message which says 'Sorry, you are already signed up.' Google has not responded to my requests for help with this issue. 

My functional workaround is to set up my own email list and each week I manually send out a new post announcement. If you are experiencing the issue and would like to be added to my personal email list please send me an email requesting to be added. Thank you for your patience!

My email address is: LDHubbell@Comcast.Net