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

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Sunday, September 23, 2018

Young Owl Feathers

Earlier this week I was attracted by the sound of an irate crow near the mouth of Arboretum Creek. As I crept closer to the commotion I spotted this owl. The sleepy predator was obviously the object of the corvid's disaffection.


It has been roughly three months since we watched this young Barred Owl leave the confines of its original home. You may read the story in the June post named, An Owlet Adventure

In late July, I spotted this pair near the mouth of Arboretum Creek. Clearly, the larger bird on the right is an adult and most likely female. In *Birds of North America it says that female Barred Owls can weigh 30 to 40 percent more than their mates. I wondered if the bird on the left was her mate or her offspring. After comparing this picture with the following photos I am thinking he is most likely her mate.

When the owl which I was watching this week shivered, I caught this rather unusual photo showing its feathers all askew.

A moment later, the feathers fell back into place. Even so, there was an unusual 'ruff' of feathers sticking up around the owl's head.

As the owl began waking up and looking around, these next few photos show little wisps of downy feathers momentarily sticking out at odd angles.

I do not remember the day being especially windy. In any case, I have never seen a whole clump of feathers stick out like this with a mature Barred Owl. There are other clues which I believe indicate this bird's immaturity. 

When the bird flew to a nearby perch the collar or ruff around the head stood out even more. 

The fact that the owl landed on a branch having a 45 degree angle also makes me think it was young. Adult owls have a strong preference for horizontal branches. I suspect a flat perch enables the owls to have a wider radius of attack and therefore increase their odds of a successful attack.

For example, from this perch any potential prey on the owl's right side would have extra time to escape while the owl attempted to navigate around the branch.

The next perch the owl chose had the same type of drawback. However, this angle of observation provides another clue regarding the bird's age. Birds of North America refers to the work of A.C. Bent when it states that in their first few months, young Barred Owls replace most of their body feathers - but not their wing or tail feathers. 

This information is helpful because the light barring on young tail feathers is more buff colored - instead of white. By next Spring the buff coloring should be gone.

I suspect the extensive personal grooming may be partly due to all the young downy feathers needing to be removed.

Certainly, this resulting pose is not common among adult owls.

Feathers sticking out in multiple directions reinforces my conclusion.

One year I watched and heard four young Barred Owls in Arboretum begging their parents for food. This year there was only the one successful fledgling. I never heard it begging. Maybe the two-to-one ratio of parents to offspring helped keep this bird very well fed. It is reassuring to know that this bird has survived the summer and is well on its way toward maturity.

As I prepared to leave, the young owl moved to a more horizontal branch closer to the stream and assumed an active hunting stance. I suspect that by next Spring, when the parents begin to focus on raising a new brood, this young bird will have been totally on its own for a number of months. Hopefully, its growing maturity will help this bird survive the challenges of winter.

Have a great day on Union Bay...where nature grow's up in the city!

Larry

Recommended Citation

Mazur, K. M. and P. C. James (2000). Barred Owl (Strix varia), 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.508

Bent, A. C. 1938b. Life histories of North American Birds of Prey (Part 2). Orders Falconiformes and Strigiformes. Bull. U.S. Nat. Mus. (170):viii-482.


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. My hope is that 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)

B)
What species are these hoppers? Are they native to Union Bay?

















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Scroll down for my thoughts










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I know next to nothing about grasshoppers. This week, I am certainly looking for expert guidance. The best I was able to come up with is that A) looks like a true grasshopper and B) looks more like a locust. For comparison I looked at this Insect Identification Guide.








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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 work around is to setup 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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