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Tundra or trumpeter swan? Utah. Usa (1 Viewer)

Birdwatcher814

Bird watcher
There has been some discussion on the Facebook pages I follow on if this is a tundra or trumpeter swan. It was seen in northern Utah on the bear river migratory bird refuge a couple weeks ago. Most say trumpeter but because of the u shaped forehead pattern I am inclined to say tundra. Any thoughts? Here is the original blog post that has 3 more images. https://bearriverblogger.com/bird-watching-tundra-or-trumpeter-swan/
 

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Bird_Bill

Well-known member
Tundra swan
-Shape of the skull, compared to the slope of the upper mandible of the bill. We see a pronounced change in the taper, following the slope to skull crown. Trumpeter would not show the top radius.

-Black of the bill does not fully embrace the eye orbit, rather it's narrower than the eye diameter.

-Grin line...been my experience that tundras are more thin lipped, while the trumpeter has a larger grin showing more red.
 

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