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<div class="elementToProof" style="font-family: Calibri, Helvetica, sans-serif; font-size: 14pt; color: rgb(0, 0, 0);">
The Potlatch and Herron Is birds look pretty identical to me. The eye color leaps out at me, making me think it's the same bird, as at least one of the CA birds identified in the paper has a true golden eye, and this one has a russet eye, looking halfway
between COGO and BUFF. </div>
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<br>
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<div class="elementToProof" style="font-family: Calibri, Helvetica, sans-serif; font-size: 14pt; color: rgb(0, 0, 0);">
So I vote for same individual. </div>
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<br>
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<div class="elementToProof" style="font-family: Calibri, Helvetica, sans-serif; font-size: 14pt; color: rgb(0, 0, 0);">
Diane</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Tweeters <tweeters-bounces@mailman11.u.washington.edu> on behalf of John Riegsecker via Tweeters <tweeters@u.washington.edu><br>
<b>Sent:</b> Thursday, March 20, 2025 2:27 PM<br>
<b>To:</b> Tweeters <tweeters@u.washington.edu><br>
<b>Subject:</b> [Tweeters] Bufflehead x Common Goldeneye Hybrid</font>
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<div class="PlainText">A Bufflehead x Common Goldeneye hybrid has been reported at Potlatch
<br>
State Park since 2018. In 2024 another hybrid was reported at Herron <br>
Island, about 17.5 miles distant overland. My first question was if <br>
this is one or two birds. eBird shows 385 reports in the United States, <br>
however many of these are of the same bird. For example the Potlatch <br>
bird has been reported 47 times, and there is a bird in California that <br>
has been reported even more often. I also came across a paper on the <br>
subject:<br>
<br>
<a href="https://www.researchgate.net/publication/382676823_Bufflehead_x_Common_Goldeneye_Hybrid_Winters_for_over_a_Decade_in_the_Sacramento_Region_California">https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.researchgate.net%2Fpublication%2F382676823_Bufflehead_x_Common_Goldeneye_Hybrid_Winters_for_over_a_Decade_in_the_Sacramento_Region_California&data=05%7C02%7C%7Cdc7cbd1a34c045145d6408dd67f60740%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638781028588019297%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=322Ul180ai%2BcD2Sdmn4uWfhT7HU%2FstNC7%2Bdxt3ET1u4%3D&reserved=0</a><br>
<br>
If these are two distinct birds, then if they are independent events <br>
this would be an unusual event. On the other hand, perhaps they are not <br>
independent and if you have one bird, the odds are improved to have a <br>
second. Reading up on the breeding and nesting habits of both breeds I <br>
don't see any reason to suspect they would stick together.<br>
<br>
I contacted one of the authors of the paper (who contacted one of his <br>
coauthors) and I now have their opinions if this is one or two different <br>
birds. Below are links to eBird lists for each bird. If any of you are <br>
so inclined, I would like hearing your thoughts. One bird or two? Feel <br>
free to reply to me off list and I will report back.<br>
<br>
Potlatch State Park<br>
Sun 6 March 2022 <a href="https://ebird.org/checklist/S104329185">https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Febird.org%2Fchecklist%2FS104329185&data=05%7C02%7C%7Cdc7cbd1a34c045145d6408dd67f60740%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638781028588039611%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=mYlT3%2FVxS7YlCGkO9GYlNxdAHUVsMpcfKGBkJAjJlqs%3D&reserved=0</a><br>
Wed 29 March 2023 <a href="https://ebird.org/checklist/S132170329">https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Febird.org%2Fchecklist%2FS132170329&data=05%7C02%7C%7Cdc7cbd1a34c045145d6408dd67f60740%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638781028588048042%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=1k5h82HIsGZ1uzSzRdT%2BLr5yhVTabPhUuBM3LyCA7hk%3D&reserved=0</a><br>
<br>
Herron Island Ferry Landing<br>
Fri 22 March 2024 <a href="https://ebird.org/checklist/S165642650">https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Febird.org%2Fchecklist%2FS165642650&data=05%7C02%7C%7Cdc7cbd1a34c045145d6408dd67f60740%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638781028588055025%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=Xl7KSk%2F0nYNLJwHKvcd0mJhZyzwb5bIb%2F9%2BbhEb%2Beik%3D&reserved=0</a><br>
Fri 14 March 2025 <a href="https://ebird.org/checklist/S218487269">https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Febird.org%2Fchecklist%2FS218487269&data=05%7C02%7C%7Cdc7cbd1a34c045145d6408dd67f60740%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638781028588061772%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=eCGLqXp4Nk2%2Fy%2B%2BiYA56QMV3aMtLbdHW1jAjFCQNcis%3D&reserved=0</a><br>
<br>
-- <br>
John Riegsecker<br>
Gig Harbor<br>
<br>
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