Tundra Swan (Whistling x Bewick's) - Bryant Olsen

ML124309381

Tundra Swan (Whistling x Bewick's) Cygnus columbianus columbianus x bewickii

Report

Contributor

Date

Location

Inland Sea Shorebird Reserve (restricted access)
Salt Lake, Utah, United States
Media from this location Illustrated Checklist
Map
Map Coordinates: 40.7837893, -112.100346
Age
Not specified
Sex
Not specified

Observation details

Bewick's or intergrade? For years now I've been seeing these Tundra Swans annually near Great Salt Lake that show extensive yellow. After further research they appear to be outside the expected norm for Whistling Swans and must have some Bewick's genes involved. This particular individual may actually be a full Bewick's as it does have a yellow orbital ring, fully yellow lores with some yellow at the base of the culmen, a more deeper yellow tone, and more oval less jagged shape to the yellow spot. Compare: 2022-02-16 (3) 2022-02-16 (2) See https://sora.unm.edu/sites/default/files/journals/auk/v097n04/p0697-p0703.pdf?fbclid=IwAR1XouNHsR8BdHu8C15ve8887iF3xo_PsfNGNPp5koK131929iBHV2Tvy1U and https://www.dutchbirding.nl/journal/pdf/DB_2015_37_5.pdf?fbclid=IwAR1_FS4FlYPRBDUwejiQJQ9DAWLjA-kyqkfiP0Wq5vnUTTg-e0PxywF_c6w#page=5&search=whistling

Technical information

Model
Canon PowerShot SX60 HS
ISO
100
Focal length
247 mm
Flash
Flash did not fire, auto
f-stop
f/6.5
Shutter speed
1/800 sec
Dimensions
4608 pixels x 3456 pixels
Original file size
2.67 MB