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Kingdom - Animals -
Animalia
Phylum - Vertebrates -
Craniata
Class - Birds -
Aves
Order - Ducks / Geese -
Anseriformes
Family - Swans / Geese / Ducks -
Anatidae
Species - Bufflehead -
Bucephala albeola
Bufflehead -
Bucephala albeola
Global Rank
:
G5
State Rank
:
S5B
Agency Status
USFWS
:
none
USFS
:
none
BLM
:
none
CFWCS Tier
:
3
PIF
:
none
General Description
Small diving duck. Males 35-40 cm, 450 g; females 32-35 cm, 325 g. Compact with short neck; short and narrow gray bill. Strong sexual dimorphism both in size and color. Breeding males: head black, glossed green and purple, with large white patch from ear-coverts across nape; back black; white underparts; wings black with large white patch occupying most of secondaries and coverts. Females: mostly dark brown on head, back and wings; pale gray on underparts. They show a white ear patch and a smaller white wing patch than males. Males in eclipse plumage are essentially female-like but with larger white patches on the wings and face. (Gauthier, Gilles. The Birds of North America, No. 67. 1993).
General Distribution
Montana Range
Western Hemisphere Range
Summary of Observations Submitted for Montana
Number of Observations:
989
(Click on the following maps and charts to see full sized version)
Map Help and Descriptions
Relative Density
Recency
Breeding
(direct evidence "B")
Breeding
(indirect evidence "b")
No evidence of Breeding
(transient "t")
Overwintering
(regular observations "W")
Overwintering
(at least one obs. "w")
(Records associated with a range of dates are excluded from time charts)
Migration
In the Bozeman latilong, normal migration periods are from March 20 to May 25 and September 1 to December 15, with peaks April 20 and November 10 (Skaar 1969).
Habitat
Freshwater, permanent ponds with no outlet or only seasonal outflow, and small lakes. Large lakes are avoided except by molting flocks. (Gauthier 1993). In general, the species is restricted to lakes and ponds (Skaar 1969).
Food Habits
Food is acquired through diving. Main foods taken are aquatic invertebrates (insects, crustaceans, mollusks). Will take some seeds. (Gauthier 1993).
Ecology
Near Fortine, numbers are believed to be increasing.
Reproductive Characteristics
Has the habit of nesting in the holes of the Northern Flicker. Will also nest in boxes. Almost exclusively monogamous, it is one of the few ducks that often keeps the same mate for several years. Single brood. Clutch size varies 6 - 11 eggs. (Gauthier 1993). Chicks less than 1 week old were recorded from June 11 to July 5 near Fortine. The average brood size was 5.
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