How to identify it
Very small diving duck, 33-38 cm long. [1]
Adult male: large white patch ('scarf') on a round, puffy black head, white sides. [1]
Female: grey head with a small white ear spot. [1]
Young male resembles the female but the white head spot is larger. [1]
Compared with the hooded merganser: Audubon's guide names the hooded merganser as the species to compare with the bufflehead's white-patched black head; check for the merganser's thin serrated bill. [1]
Species it is confused with
Check these before deciding what you are looking at. If you are not certain what it is, do not shoot.
- Hooded merganser · Lophodytes cucullatus
Where it lives
Nests around ponds and small lakes in open mixed coniferous-deciduous forest, burns and aspen groves, using tree cavities such as old Northern Flicker holes and nest boxes. Winters on sheltered salt bays and estuaries and on inland lakes, ponds and slow rivers. [1]
How it behaves
Seen in pairs or small groups, almost never in large flocks; members of a small flock often dive at the same time. [1]
Where it is listed for legal take
These authorities list this species for legal take in their own regulations.
Where legal take is listed
- Alberta — migratory bird hunting · 2026 Alberta Guide to Hunting Regulations
- British Columbia — migratory bird hunting · 2026-2028 Hunting and Trapping Regulations Synopsis
- Canada (federal migratory birds) — migratory bird hunting · Migratory Birds Regulations, 2022 (SOR/2022-105), Schedule Parts 7-13 (MB, SK, AB, BC, NT, YT, NU)
- New Brunswick — migratory bird hunting · Migratory Birds Regulations, 2022, Schedule 3, Part 4 (New Brunswick) (current to 2026-09-21)
- Newfoundland and Labrador — migratory bird hunting · Migratory Birds Regulations, 2022, Schedule 3, Part 1 (Newfoundland and Labrador) (current to 2026-09-21)
- Nova Scotia — migratory bird hunting · Migratory Birds Regulations, 2022, Schedule 3, Part 3 (Nova Scotia) (current to 2026-09-21)
- Ontario — migratory bird hunting · Migratory Birds Regulations, 2022, Schedule 3, Part 6 (Ontario) (current to 2026-09-21)
- Prince Edward Island — migratory bird hunting · Migratory Birds Regulations, 2022, Schedule 3, Part 2 (Prince Edward Island) (current to 2026-09-21)
- Québec — migratory bird hunting · Migratory Birds Regulations, 2022, Schedule 3, Part 5 (Quebec) (current to 2026-09-21)
- Saskatchewan — migratory bird hunting · Saskatchewan Hunters Guide 2026-27
- Alabama — migratory bird hunting · Waterfowl Seasons 2026-2027 (ADCNR)
- Alaska — migratory bird hunting · 2026-2027 Alaska Migratory Game Bird Hunting Regulations
- Arkansas — migratory bird hunting · Waterfowl Season Dates, Rules & Regulations (2026-27)
- Colorado — migratory bird hunting · 2 CCR 406-5 Chapter W-5 Migratory Birds (03/04/2026; eff. 2026-05-01)
- Connecticut — migratory bird hunting · 2026-2027 CT Migratory Bird Hunting Guide
- Delaware — migratory bird hunting · 2026-27 Delaware Hunting & Trapping Guide: Migratory Bird Seasons & Bag Limits
- Georgia — migratory bird hunting · 2026-2027 Season Dates - Migratory Birds (WRD 1-page synopsis, linked from georgiawildlife.com/migratory-bird-info)
- Idaho — migratory bird hunting · Idaho Migratory Game Bird 2026-2027 Seasons & Rules
- Illinois — migratory bird hunting · Illinois Digest of Hunting and Trapping Regulations 2026-2027 (PDF read from cached copy of the digest linked on this page)
- Iowa — migratory bird hunting · 2026-27 Iowa Hunting, Trapping & Migratory Game Bird Regulations (DNR PDF; page numbers cited)
- Kansas — migratory bird hunting · Kansas Hunting & Furharvesting Regulations Summary, Fall 2025-Spring 2026
- Kentucky — migratory bird hunting · Kentucky Hunting & Trapping Guide, August 2026-March 2027
- Louisiana — migratory bird hunting · 2026-2027 Louisiana Hunting Regulations (updated Aug 7, 2026)
- Maryland — migratory bird hunting · 2026-27 Maryland Guide to Hunting & Trapping (official guide, linked from dnr.maryland.gov/huntersguide)
- Minnesota — migratory bird hunting · Minnesota Hunting & Trapping Regulations (effective July 2026 - June 30, 2027)
- Mississippi — migratory bird hunting · Migratory Gamebird Digest 2026-27 (MDWFP)
- Missouri — migratory bird hunting · Migratory Bird and Waterfowl Hunting Digest 2026-2027 (cached PDF from MDC regulations page)
- Montana — migratory bird hunting · 2026 Waterfowl, Sandhill Cranes, Mourning Doves & Snipe Regulations
- Nebraska — migratory bird hunting · Small Game & Waterfowl Guide 2025-2026
- New Mexico — migratory bird hunting · 2026-2027 New Mexico Migratory Game Bird Supplement
- North Carolina — migratory bird hunting · Proclamation: 2026-2027 Migratory Game Bird Hunting Seasons (NCWRC)
- North Dakota — migratory bird hunting · 2026-2027 Small Game, Waterfowl and Furbearer Proclamation
- Ohio — migratory bird hunting · Ohio Hunting and Trapping Regulations 2026-27 (effective 1 Sep 2026-31 Aug 2027); PDF read from cached copy
- Oklahoma — migratory bird hunting · Ducks, Mergansers & Coots
- Pennsylvania — migratory bird hunting · 2026-27 Seasons and Bag Limits
- Rhode Island — migratory bird hunting · Hunting and Trapping Regulations (250-RICR-60-00-9)
- South Carolina — migratory bird hunting · 2026-2027 South Carolina Hunting & Fishing Laws and Regulations Guide
- South Dakota — migratory bird hunting · 2026 South Dakota Hunting and Trapping Handbook
- Tennessee — migratory bird hunting · Summary of Tennessee Hunting and Trapping Seasons Dates | TWRA
- Utah — migratory bird hunting · 2026-27 Waterfowl, Upland Game and Turkey Guidebook
- Virginia — migratory bird hunting · Migratory Game Bird Regulations | Virginia DWR
- West Virginia — migratory bird hunting · West Virginia Migratory Game Bird Regulations Sept 2026-Jan 2027
- Wisconsin — migratory bird hunting · 2026 Wisconsin Hunting and Trapping Seasons PUB-CS-076-2026 (updated 06/08/2026)
- Wyoming — migratory bird hunting · WGFC Ch. 14 Migratory Game Bird Hunting Seasons and Light Goose Conservation Order (dated Apr 22 2026)
Being listed is not an open season. Seasons, zones, licences, methods and limits decide whether this animal may be taken on a given day and place — check Hunt or the authority before you go. Listings read 2026-09-30.
Where it is found
Occurs across Canada and the United States, from Alaska and the North, Western and Eastern Canada south to California, Texas, the Southeast and Florida; breeds in northern forests and winters farther south and on the coasts.
Sources
Every claim above is attributed to one of these published sources.
National Audubon Society · reviewed 2026-09-30
National Audubon Society