Date: 4/19/17 12:55 am
From: <pnitens...>
Subject: [obol] Re: The most Oregonian bird?
I thought that was an interesting question, so took a stab at
answering it by crunching some ebird bar-chart data that I had
available (one caveat is I only looked at pre-2016 US data). After
playing with the numbers a bit, my definition of "most uniquely
Oregonian" turned out to be what one sees more easily in Oregon than
in any other state.

I first queried which birds appear on Oregon lists more frequently
than on lists from any other US state and came up with:

 species                | % Oregon lists
------------------------------------------
 White-capped Albatross |  0.00032809
 Red-breasted Goose     |  0.00032815
 Wandering Albatross    |  0.00065618
 Murphy's Petrel        |  0.018373
 Tundra Bean-Goose      |  0.085978
 Northern Pygmy-Owl     |  0.70303
 Olive-sided Flycatcher |  1.9213
 Hermit Warbler         |  2.5235
 Vaux's Swift           |  4.7247
 Red-breasted Sapsucker |  5.1729
 Swainson's Thrush      |  6.5426
 Western Tanager        |  7.2922
 Cackling Goose         |  7.3949
 Brown Creeper          |  8.169
 Black-headed Grosbeak  |  9.2638
 Steller's Jay          | 23.274
 Spotted Towhee         | 28.436
 Dark-eyed Junco        | 32.392

The number of ebird lists that White-capped Albatross, Red-breasted
Goose, Wandering Albatross or Murphy's Petrel appear on is really low,
so I didn't bother with them anymore.

Similarly, the Tundra Bean-Goose was a one season wonder.

The other species seemed like legitimate contenders, so I thought I
would look at how often they appear on the lists of the other states
where they are most frequently reported and compare the percentage of
lists in Oregon with the percentage of lists of the next closest
state. (That data begins below after the next paragraph).

Of species that breed in Oregon, Hermit Warbler is seen almost twice
as often in Oregon as in any other state. Of species that winter in
Oregon, Cackling Goose is seen 1.71 times as often as in any other
state. And of the residents, Northern Pygmy-Owl appears on 1.60 times
as many lists as any other state. Honorable mention in the breeding
category goes to Vaux's Swift (1.73), and to Red-breasted Sapsucker in
the resident category (1.47).

Dark-eyed Junco
 Oregon     | 32.392
 Washington | 31.344
 Indiana    | 25.385
 New Mexico | 24.734
 Missouri   | 24.103
------
Oregon lists:Washington lists = 1.03:1

Spotted Towhee
 Oregon     | 28.436
 Washington | 27.282
 California | 20.928
 New Mexico | 20.665
 Nevada     | 11.513
-----
1.04:1

So Dark-eyed Juncos and Spotted Towhees are reported more often in
Oregon than in any other states, but they are still quite common in
other states, so don't seem uniquely Oregonian.

Steller's Jay
 Oregon     | 23.274
 Washington | 19.728
 California | 12.399
 Colorado   |  9.9287
 Nevada     |  9.2062
------
1.18:1

Oregon's lead over Washington in Steller's Jay report concentration is
a little larger.

Black-headed Grosbeak
 Oregon     |  9.2638
 Arizona    |  8.0683
 New Mexico |  7.7892
 Washington |  6.8255
 California |  6.7033
-----
1.15:1

Brown Creeper
 Oregon        |  8.169
 Washington    |  6.3031
 New Hampshire |  5.9753
 Vermont       |  4.9041
 Indiana       |  4.454
------
1.30:1
The Brown Creeper lead over Washington is larger still.

Cackling Goose
 Oregon     |  7.3949
 Kansas     |  4.3292
 Alaska     |  3.493
 Washington |  3.4408
 Colorado   |  3.44
------
1.71:1
And the Cackling Goose margin is the largest yet. Of course, they
don't breed here...

Western Tanager
 Oregon     | 7.2922
 Nevada     | 6.5454
 Idaho      | 6.4213
 New Mexico | 5.9798
 Arizona    | 5.9399
------
1.11:1

Swainson's Thrush
 Oregon           | 6.5426
 Washington       | 5.4059
 North Dakota     | 5.1758
 Montana          | 4.7796
 Washington,  D.C | 4.7094
------
1.21:1

Red-breasted Sapsucker
 Oregon     | 5.1729
 Washington | 3.5169
 California | 2.5278
 Alaska     | 2.3146
 Nevada     | 1.2186
------
1.47:1

Vaux's Swift
 Oregon     | 4.7247
 Washington | 2.7276
 Montana    | 1.3331
 California | 1.1029
 Idaho      | 0.9591
------
1.73:1

Hermit Warbler
 Oregon     | 2.5235
 California | 1.2696
 Arizona    | 0.9556
 Nevada     | 0.3004
 Washington | 0.1395
------
1.99:1

Olive-sided Flycatcher
 Oregon     | 1.9213
 Washington | 1.7754
 California | 1.6761
 Nevada     | 1.4354
 New Mexico | 1.2043
------
1.08:1

Northern Pygmy-Owl
 Oregon     |  0.70303
 Arizona    |  0.43926
 Washington |  0.4327
 Idaho      |  0.42127
 Montana    |  0.38754
------
1.60:1

That's my approach.

Tait
Portland

----- Original Message -----
From:
<jonathan...>

To:
<obol...>
Cc:

Sent:
Tue, 18 Apr 2017 20:16:33 -0700
Subject:
[obol] Re: The most Oregonian bird?

PS: I just wanted to add that this is purely an academic question,
not a political one – nothing to do with our official state bird.

 

FROM: Jonathan Ley [mailto:<jonathan...>]
SENT: Tuesday, April 18, 2017 7:31 PM
TO: '<obol...>' <obol...>
SUBJECT: The most Oregonian bird?

 

Greetings… I’m new to this list, and had a question.

 

The recent story about changing the state bird of Oregon got me
wondering – which bird would be the most “uniquely Oregon”?
Ideally, by my measure that’d be a bird with a full-year range
exactly matching the border of Oregon. Since that doesn’t exist,
which is the closest to it?

 

I was thinking perhaps a Wrentit, or “Oregon” Dark-eyed Junco,
maybe Red-breasted Sapsucker… White-headed Woodpecker… Anyone have
ideas?

 

Jonathan Ley

Portland



 
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