Trumpeter Swan (Cygnus buccinator), Buckeye, Maricopa County
This Trumpeter Swan was
found by Kara Cordoza and Jim Ripley and photographed by Jim on 07 January 2017
Though possibly increasing, Trumpeter Swan remains
very rare in Arizona, with six accepted records and six
pending review, including one from earlier this winter.
Swan identification can be extremely difficult, but
adults are generally straightforward, as is the case
with this bird. Identification relies mainly on details
of the bill. Most adult Tundra Swans have a yellow loral
spot, but 1-2% lack such a spot. This bird lacks the
loral spot, typical of Trumpeter Swan. Trumpeter Swans
have a straight edge down from the eye between the
facial skin/ramphothecum and the feathers, whereas in
Tundra this is more curved or kinked, but there is
variation in this trait. This bird has a salmon-colored
grin streak which is always present in Trumpeter Swan,
less often in Tundra. Tundra Swan usually, but not
always, has a narrow strip of black loral facial skin
that makes the eye seem separate from the black bill.
Most Trumpeters, including this one, have wider facial
skin that makes the eye seem visually part of the bill.
Finally, the neck of Trumpeter Swan is relatively
longer, often held in a strong S-curve.
07 January 2017, photo by Jim RipleyAll photos are copyrighted© by photographer
Submitted on 08 January 2017