A studio for bird study

Tag: birds

Barred Owl – Out of Range but Seemingly Comfortable

by Bryce W. Robinson

 

Around the turn of the year a Barred Owl – Strix varia, was reported in Boise, Idaho. The owl has been seen regularly for the past month. Barred Owls occur in Boise once every few years as vagrants from somewhere unknown. This Barred Owl showed up in a city park on the east side of town, only about a mile from the foothills. The peculiar part is that the park is adjacent to the Boise River, a large wooded area, and acres of open field. Instead of occupying these more wild, less human areas, the owl has chosen the back yards adjacent to the park to roost. The bird hunts the park edges and greens at night, apparently having loads of success. This behavior is a testament to the hardness of this species against human disturbance. It is one of those few species that seems to do well with the world we are creating.

I took the video above a few days ago just before sunset. The owl was alert, no longer snoozing. The most interesting thing about the video is the birds behavior coupled with the anthropogenic noise. In the clip you can hear a man playing fetch with his dog, someone closing a house door, and many other human sounds typical of urban living.

Why is this Barred Owl able to tolerate a lifestyle like this, yet other species are so sensitive to disturbance? The Barred Owl’s closest North American relative, the Spotted Owl, is certainly having a hard time with the way we are changing its world. These types of questions are worth entertaining as more and more we change the world around us, better for some but certainly not for all.

 

Learning New Skills – Preparing Study Skins

by Bryce W. Robinson

From left to right: Sora - Porzana carolina, 2 male Brown-headed Cowbirds - Molothrus ater, 2 female Brown-headed Cowbirds - Molothrus ater

From left to right: Sora – Porzana carolina, 2 male Brown-headed Cowbirds – Molothrus ater, 2 female Brown-headed Cowbirds – Molothrus ater, all drying after preparation.

I’ve embarked on a new adventure in my ornithological education. I am now learning how to prepare study skins for museum collections with the help of my advisor Dr. David Anderson. My personal catalogue number 001 is a female Brown-headed Cowbird – Molothrus ater (farthest right specimen in the photo).

This is a new experience for me, and one that I’ve been looking forward to for a very long time. I’ll be sharing what I learn along the way.

Black Turnstone Feeding Behavior

by Bryce W. Robinson

 

It is a great experience to see behaviors that obviously gave rise to a creature’s name. The Black Turnstone – Arenaria melanocephala is black, and feeds in the most interesting way as its name implies. It frequents rocky shorelines and turns stones to find food. I was lucky enough to find two birds staging along a tidal pool in western Alaska. The birds were living up to their namesake, turning stones vigorously in search of food.

Another aspect of observation that gives me satisfaction is recognizing a behaviors role in shaping morphology. The turnstone has a unique bill shape, adapted to gain leverage and flip stones in an effortless manner. What I’d like to investigate is the difference in muscle morphology in the neck and back between other close relatives that do not engage in this behavior.

“Behavior birding” holds a treasure trove of opportunities to ask questions and learn great lessons that further understanding of the bird world.

 

Juvenile Gyrfalcon – Falco rusticolus

by Bryce W. Robinson

Juvenile Gyrfalcon - Falco rusticolus. Image taken 7 July, 2014 at an eyrie in Western Alaska.

Juvenile Gyrfalcon – Falco rusticolus. Image taken 7 July, 2014 at an eyrie in Western Alaska.

I’m working on research that is meant to highlight the key parts of what Gyrfalcons eat while they are raising their young, and how any changes may impact their ability to thrive. I’ve gained an appreciation for the amount of effort and energy that is required to transform an egg into a Gyrfalcon capable of flight. The entire lives of the parents during this period revolves around the need for food and the care of the young. It is an impressive spectacle, and a wonder that they are able to put out young so successfully.

Additionally, I’ve come to an appreciation of the fact that the existence of these creatures depends solely on the destruction of other life. They destroy to thrive. This fact seems almost antithetical, but it touches upon an absolute in nature. That absolute is that both the burgeon and termination of life is all part of the natural flow of energy. This absolute keeps me on my path to explore birdlife and ensure that this flow continues for as long as I am responsible.