Re: [CALBIRDS] Trumpeter Swans, San Joaquin Co.
Identifying Trumpeter Swans from Tundra Swans can be difficult,
especially if they are not side by side to see the differences. And,
attempting to identify swans from a photo is even more difficult.
But, I think the swans in your photos appear to be Tundras. They do not
have the thick necked, heavy head shape, long-billed profile or facial
feather pattern of a Trumpeter.
At the Central Vally Birds Yahoo Groups website page, I temporarily
inserted a useful photo of a Trumpeter near a Tundra Swan that shows the
size of the head, neck and bill differences.
Members of CVBirds can access photo albums on the web site which has a
Trumpeter Swan Album with more photos.
Perhaps others will chime in with opinions.
Granite Bay, CA
On 11/25/2012 10:26 PM, Mark Rauzon wrote:
> Trumpeter Swans, adult and young, were also seen at Isenberg Crane Reserve on Woodbridge Road, San Joaquin Co. on Friday, 11/23/12
> Mark J. Rauzon
> Laney College
> Geography Dept.
> 900 Fallon St.
> Oakland, CA 94607