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Common Merganser
This is an adult male in winter plumage. Although this species has increased rather dramatically in the San Francisco Bay Area I still seldom encounter very many adult males. This is partly because immature males and adult males in summer ("eclipse" plumage) resemble females. Common Mergansers are divided into two groups. Eurasian birds (sometimes known as Goosander) have a somewhat thinner bill with a stronger hook at the tip. Another difference is the entirely red bill of American birds. Goosander usually has the lower mandible partly black. Notice the more sloping head blending into the thicker bill base, another feature of the American population (subspecies "M. m. americanus").
Location
Erckenbrack Park, Foster City, California, USA.
Date taken
03 February 2022.
Scientific name
Mergus merganser
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Media information

Category
North America
Added by
jmorlan
Date added
View count
212
Comment count
3

Image metadata

Device
Canon Canon PowerShot SX70 HS
Aperture
ƒ/6.3
Focal length
188.0 mm
Exposure time
1/1000 second(s)
ISO
100
Filename
CommonMerganserIMG_9413.jpg
File size
168.2 KB
Date taken
Tue, 08 March 2022 12:44 PM
Dimensions
1024px x 704px

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