redbreasted merganser (Mergus serrator)
CONFIRMATION STATUS: Confirmed.
Length: 16 inches Wingspan: 33 inches
Large, sleek diving duck
Long, pointed bill with serrated edges
Thin, red bill seems evenly tapered throughout length
Shaggy crest obvious in both sexes
Immature similar to adult female
Reddish breast with dark streaks, bordered on sides by black-and- white patch
Gray flanks, tail, rump and uppertail coverts
White secondary coverts
Alternate plumage worn from fall through early summer
Male in basic eclipse plumage like adult female
Red-brown head, paler on throat, but without well-defined chin
Red-brown head fades evenly to paler breast
Gray and white breast and belly
Gray-brown body plumage
Adult male in alternate plumage is similar to male common merganser
but has reddish breast and gray flanks. Female, immature and eclipse
male distinguished from similarly-plumaged common mergansers by
lack of sharply-defined chin and lack of sharp contrast between reddish
head and white breast, and by darker gray plumage, spikier crest, and
slimmer bill. In winter, Red-breasted mergansers are more likely to be
found in saltwater habitats than are common mergansers.
Migration Status: N/A
Breeding Habitat: N/A
Nest Location: N/A
Nest Type: N/A
Clutch Size: 7-12
Length of Incubation: 30(29-35) days
Days to Fledge: 59(<65)
Number of Broods: 1
Diet: Mostly fish; lesser quantities of aquatic invertebrates
SKY MEADOWS DISTRIBUTION/SEASONAL OCCURRENCE
Relative abundance and seasonal occurrence are indicated in red below.
C - Common: Likely to be present in good numbers in appropriate habitat and season.
U - Uncommon: May be present in appropriate habitat and season, often in low
O - Occassional: Found in appropriate habitat perhaps only a few times per season,
sometimes low numbers.
R - Rare: May not be recorded every year.
Acc - Accidental: Recorded once or twice, may not be expected again for a long time.
Sp - Spring: March, April, May R
Su - Summer: June, July, August
Fall: September, October, November
Winter: December, January, February
Crooked Run Valley