lesser scaup (Aythya affinis)
CONFIRMATION STATUS: Confirmed.
Length: 12 inches Wingspan: 29 inches
Small, compact diving duck
Blue bill with small black nail at tip
Dark wing with dark tipped white secondaries and pale gray primaries
Immature female similar to adult female, immature male is similar to female in autumn, but acquires alternate plumage during winter
Adult male alternate:
Alternate plumage worn from fall through early summer
Glossy purplish head
Whitish or pale gray flanks, white belly
Whitish back with fine black vermiculations
Black tail, upper- and under-tail coverts
Adult male basic:
Similar to adult female
Distinct white band around base of bill
Dark brown body plumage
Adult male ring-necked duck similar in alternate plumage but has quite
different bill pattern, black back, grayer flanks and vertical white finger
just behind black breast. Greater scaup is very similar but has a more
rounded head, larger bill, dark-tipped white primaries and secondaries,
and glossy, greenish head as an adult male in alternate plumage. Female
greater scaup has more rounded head, a broader bill, and more white
flight feathers, and frequently has a distinct pale spot behind eye on side
Breeding Habitat:Wetland-open water
Length of Incubation: 21-28 days
Days to Fledge:45-50
Number of Broods:1
Diet: Mostly green plant matter and seeds; lesser quantities of aquatic
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
Su - Summer: June, July, August
Fall: September, October, November Acc
Winter: December, January, February
Crooked Run Valley