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

On Instagram: @unionbaywatch
Showing posts with label Nest Building. Show all posts
Showing posts with label Nest Building. Show all posts

Sunday, March 29, 2020

A Backyard Bird

A male House Finch is a beautiful bird. Originally, they were from the southwest, which is implied in the second half of their scientific name, Haemorhous mexicanus. Today, House Finches can now be found in 49 out of the 50 states. Many years ago, they had some human help in getting to both New York and Hawaii. During the following decades, they made good use of the opportunity to dramatically expand their range. It's not surprising that a bird that originated in the desert has yet to establish itself in Alaska.

In general, House Finches tend to migrate vertically. When the snow reaches the mountains they like to come down into snow-free cities and make good use of the warmth and the seeds which they find in our bird feeders.

This female finch appears to be collecting the leaf stem from a Big Leaf Maple to be used in nest building.

For the most part, females lack the bright coloring of the adult males. Immature birds, of both genders, also wear basic brown.

Males get their red coloring from the fruit they eat. Depending on the fruit, their bright spots can occasionally be orange or yellow.

This August photo shows what appears to be a young male bird, which is apparently molting into its mature coloring. One clue to its youth is the fine streaking on the belly. Looking back at the two adult photos, you can see that their vertical belly stripes are not nearly as delicate.

In this June photo, if you look close, you can see that a male is regurgitating food for a full-sized young bird. After the young leave their nests the male birds apparently take over all of the feedings. This frees up the females to focus on producing their next brood. All About Birds says House Finches can have as many as six broods per year.

This October photo also shows a male beginning to get its color. 

In the fall, House Finches regularly dismantle the 'hops'  found on the Hophornbeam in the Arboretum (on the east side of Duck Bay) to consume the seeds. 

The gray-brown patch on the upper cheek is one way the colorful males can be distinguished from Purple Finches. You can learn more about their differentiating features by Clicking Here.

Since almost all of us are spending an abnormally large amount of time at home, this might be a good time to watch for nest-building behavior in your backyard. The House Finch starts with relatively larger twigs to build the supporting structure of the nest.

They progress to smaller and softer materials.

In this case, the female is eyeing the opening in the bushy conifer that leads to her nest site.

There is no way to view this nest, which is wonderful. Her eggs and her young will be much more likely to survive in such a nicely hidden location.

Later, she brought in what appeared to be thin strips of shredded bark.

Although, from this angle, it looked more like dried grass.

Her mate occasionally helped.

Bringing in this very fine white material seemed like an indication the nest was nearing completion. 

I really have no idea what type of plant could produce such a long thin fragment, but it sure looked soft and warm, just like a baby's blanket.

The materials the finches are using could be considered hints to making our backyards into wildlife sanctuaries. Leaving grass to grow tall and dry out, leaving the down from flower and tree blossoms, leaving bark that is decaying and falling off trees and leaving last year's leaves to decay on top of your flower beds could provide almost all of the materials seen in this post. Also, having some thick conifer shrubs or trees, hopefully, with vegetation all the way to the ground, could provide some nice hidden nesting spots.

Generally, the male accompanies the female where ever she goes. Sometimes he helps bring nesting material, and sometimes he appears to be simply standing guard. In this photo, he was waiting patiently while she updated the nest. When he tilted his head, it seemed obvious that he was listening to a nearby House Finch singing its warbling song. 

When the neighbor took a breath, the male visibly raised his head, despite the rain.

He opened his mouth and replied with his own version of the House Finch melody. As the two birds took turns singing, the male looked around apparently trying to find the source of the sound. 

Clicking Here will take you to an example of a House Finch song on All About Birds. Often at the end of a phrase, a House Finch will produce a somewhat less melodic sound. In my mind it makes me think, 'Splat'. Since no other finch makes that final sound, I find it very useful in identifying the song of a House Finch, even when I cannot see them.

Have a great day on Union Bay or...in your own backyard!

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. 






A low-growing plant that is currently beginning to bloom around Union Bay,

Here is a better look at the foliage? Is it native to our area? 












Scroll down for the answer.














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Pacific Bleeding Heart: The scientific name is Dicentra formosa. It is a native plant that can bloom all summer if you remove the flowers as they age. Follow the highlighted link to learn more about its elaiosome.












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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



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As a reward to those who have read this far, here are a few more House Finch photos.

Finches generally have a 'notched tail', however, this example is a bit over the top. 

When birders refer to finches having 'notched tails' this is what usually comes to mind. The previous photo does demonstrate why the subtle, 'perched' notch exists.

Sunday, March 22, 2020

Our Heros

All life on earth struggles to survive. Our current conflict with the covid virus is a stark reminder. The virus challenges our existence as individuals and our capabilities as a society. 

Words cannot express our gratitude to the nurses, doctors and first responders who are fighting on the front lines. They are our heroes!

As a society, we are challenged to do what we do best. Adapt, learn and overcome. Social distancing is a start. As a society, we must do more. We must learn, quickly. The clear and quick communication of facts, followed by timely scientific research, and the rapid application of the results, is critical to our future.

In times like these, celebrating the arrival of Spring and the creation of new life may feel like an inappropriate distraction. Instead, I hope the wonder and beauty of life will provide food for our souls and inspire us to fight on.

Earlier this week, this tiny Black-capped Chickadee waited for a chance to help excavate a new nest.

Its mate was already hard at work. Their nest will need to be deep, given the small diameter of this tiny snag. Otherwise, their eggs will be easily reached by predators.

Taking turns, the two chickadees removed the soft dead wood, one beak-full at a time. 

Rather than creating a noticeable pile of wood chips directly below the nest, they distributed the shavings elsewhere.

After an extensive amount of work, one of the chickadees settled inside a dense bush so it could safely clean up and straighten its feathers.

The process required checking under-the-hood or in this case under-the-wing.

The chickadee finally finished up with some stretching. 


It turns out that the chickadees are not the only ones to notice that Spring is here. Not far away a crow updated last year's nest with a new branch.

The Double-crested Cormorant on the left is adding new crests and hoping to increase its odds of mating. 

This female House Finch, who was accompanied by a very protective male, disappeared into a nearby spruce tree with this piece of nesting material.

This Red-breasted Nuthatch inspected an old and well-used nest. 

Marsha continues to incubate new eggs, in her newly rebuilt nest above Montlake Cut. 
(Thank you to eagle-eyed Jeff - for the early head's up on this year's nesting behavior!)

Her mate Monty can often be seen sitting nearby while he watches over Marsha and their new eggs.

Sometimes, Monty visits the nest and occasionally he takes over incubating so Marsha can stretch her wings and find some food for herself.

Yesterday, the male Cooper's Hawk (on the right) broke twigs off this tree and added them to a new nest. After a half a dozen trips, the female (on the left) allowed him to mate. Afterward, he jumped down and quickly put a little space between them. He is fast, but among predator birds, the females are usually bigger and stronger. A respectful distance seems appropriate.

This morning, the female Cooper's Hawk was sitting quietly in the new nest. Suddenly, she began a rapid vocalization and abandoned the site. A Red-tailed Hawk, which is significantly larger, landed in the Cooper's Hawk nest. The nest was inspected for food. Finding none, the Red-tail left. I am sure the harassment provided by the local American Crows was a contributing factor. Luckily, the Cooper's Hawks have apparently not yet laid any eggs.

Yesterday, a potentially similar encounter was handled differently by the Common Ravens. The raven on 'guard duty' immediately started calling when a Red-tailed Hawk attempted to fly through their territory. The raven's mate quickly appeared, most likely from a nearby nesting tree. The two smaller birds darted and dived as they aggressively chased the red-tail away. 

Spring, even with all of its beauty, remains a fight for survival. This year our fight feels a bit too close for comfort. More than usual, it falls to each of us to stay strong, careful and patient. Our consistent efforts will help our families and friends to survive.

Thanks again to the nurses, doctors and first responders. May our heroes also stay healthy and safe!

Sincerely, 
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 species of fern is this? Is it native to our area? 












Scroll down for the answer.














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Licorice Fern: Polypodium Glycyrrhiza is native to our area. Native Americans apparently used it as a treatment for a sore throat, etc. Click on the highlighted name to learn more.










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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



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As a reward to those who have read this far, compare the photo of a young Cooper's Hawk, above. To this week's mature Cooper's Hawk in the photo below.

In addition to the horizontal barring versus the vertical striping, Did you notice any other obvious differences? If not, check out the eye color and the dark 'cap' on the mature bird's head.

Sunday, February 23, 2020

Silent and Subtle

Common Ravens are unique! They are the world's largest songbird. As such, they do not have the curved bill or long talons of an eagle or a hawk. Ravens rely on their intelligence more than their physique. Their most overlooked physical gift maybe their color. I heard a new phrase this week which seems to apply, 'Black conceals and white reveals.' When ravens settle into the shadows they seem to simply disappear. As songbirds, they can be bold and loud, but they can also be silent and subtle.


If you wander through their territory it is highly likely that they are watching you, even if you do not notice them at all. I do not think it was an accident that Edgar Allan Poe chose a raven to star in his most famous poem. Their intelligence feels obvious. They seem more similar to humans than any other avian species.

On the other hand, when they choose to be heard they can be very hard to miss. I first saw ravens in the Arboretum, almost one year ago. Ever since I have been wondering, Would they stay? Would they adapt to the constant presence of humans? Would they find adequate food? Would all our mechanical noises be too much for them? This week, for the first time, they may have finally made their intentions known.

Common Ravens exist all around the world and even though I do not comprehend their language, scientists think that the ravens may have different versions of their 'language' depending on where they live. In Birds of North America (BNA)*, I found the following comment regarding ravens, 'Recent evidence suggests that there are local dialects and individual-specific calls so that the total vocal repertoire may be virtually limitless.' That certainly sounds a lot like humans, except that ravens can vocalize sounds which we can only dream of making.

*Enggist-Dueblin, P. and U. Pfister. (1997). Communication in ravens (Corvus corax): call use in interactions between pair partners. Advances in Ethology 32:122. 

When compared with American Crows, Common Ravens have longer wings which help them make use of wind currents and up-wellings. Crows have shorter, rounder wings and their nearly constant wingbeats give them away. You can read more about how they compare by Clicking Here. Another new phrase, which I just learned lately, is 'If it's rowing, it's crowing!' This seems like an excellent memory tool for distinguishing distant crows from ravens.  Thank you, Bev.


For the last year, I have been waiting and hoping to see signs of nest building. This week, I was lucky to see at least two ravens moving through the upper branches of tall trees. As they worked they seemed to appear only momentarily before blending back into the shadows.

They seemed to prefer the tallest of the native trees and they worked on limbs which were quite high but with cover overhead. 

On Monday, it became evident that the ravens were nest building. I was somewhat surprised to see them carrying green branches with foliage still attached. I wondered if the foliage might indicate that their nest is nearing completion.

However, they also carried branches without foliage.

They worked at two different sites. Surprisingly, I cannot find any mention of ravens building two nests at one time. BNA* says, '... Nonetheless, despite more than 1,400 research  reports and articles on this bird in the scientific literature, there are many gaps in our expanding knowledge of this fascinating species.'

I also could not prove that I saw only one pair of ravens, maybe there were two pairs, but I doubt it. The 'nest' sites seem simply too close for comfort.

The next day, I saw one of the ravens chase a Red-tailed Hawk out of the Arboretum. Red-tails and Ravens are of a similar size but the hawk is endowed with the talons and tools of a predator. The second raven trailed behind the first one, apparently ready to provide air support if needed. The first raven's courage and indignation carried the day. The hawk's focus was on escaping.

Both the hawk and the secondary nest site were roughly the same distance from the primary site. Plus, each following day, as I visited the Arboretum, I heard a raven calling near the primary site, although, I seldom saw them. I am excited to say that, this year, I believe the Ravens will be raising young in and around the Arboretum.

In both cases, the trees were tall and the foliage thick. I have not actually seen either nest. I can only infer from what I have observed.

At present, I have no plans to publish their potential nest locations. I do not know how much attention might be too much for the Ravens. Plus, I would not want to deprive anyone of the joy and mystery I have experienced. Following their sounds and movements with reverence makes every new reveal an incredibly satisfying experience. I know and respect that they are making a choice to reside close to us. This common existence is a treasure to be protected and an incredible opportunity to enrich our urban lives. When I am in their territory, I too strive to be silent and subtle. So far, it has certainly been worth the effort!


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

Larry



*Recommended Citation

Boarman, W. I. and B. Heinrich (1999). Common Raven (Corvus corax), version 2.0. In The Birds of North America (A. F. Poole and F. B. Gill, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bna.476


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. 








Until the leaves come out, I cannot be absolutely positive whether this is a native tree species. However, I believe there is only one primary native species that has been showing yellow male catkins, like these, during the last month. Which one is it?







Scroll down for the answer.














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Red Alder: Old, decomposing Red Alder trees have provided nest sites for our local Pileated Woodpeckers for the last eight years.






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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


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As a reward to those who have read this far, let me recommend this week's post by my friends Dan, Craig and Joy at: