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Are There Buffleheads in Wyoming?

Yes, buffleheads are common in Wyoming. These small diving ducks breed on mountain lakes and reservoirs, particularly in western and central regions. During spring and fall migration, large numbers pass through the state. Some remain in winter on ice-free lakes and rivers. Wyoming offers excellent opportunities to see buffleheads during breeding season and migration periods.

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By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 21, 2026.

Bufflehead photographed in Wyoming

Bufflehead · Gavin Slater CC BY

Bufflehead photographed in Wyoming

Bufflehead · Public domain CC0

Bufflehead photographed in Wyoming

Bufflehead · Dennis Eckhart CC BY

Photos by iNaturalist observers, reused under the licence each observer chose.
Found in Wyoming
12,596
GBIF records
6
birding hotspots

Yes, buffleheads are in Wyoming. Next you'll want:

Yes, buffleheads are common in Wyoming. These small diving ducks breed on mountain lakes and reservoirs, particularly in western and central regions. During spring and fall migration, large numbers pass through the state. Some remain in winter on ice-free lakes and rivers. Wyoming offers excellent opportunities to see buffleheads during breeding season and migration periods.

Where Buffleheads Are Found in Wyoming

Buffleheads occur throughout Wyoming in different seasons and habitats. Breeding birds occupy mountain lakes and reservoirs in the western and central portions of the state. The Greater Yellowstone Ecosystem supports numerous breeding birds on Yellowstone Lake and surrounding waters. The Bighorn Basin includes productive lake systems that host breeding populations. Eastern Wyoming mountain lakes in the Black Hills region support smaller numbers of breeding birds. The North Platte River system provides habitat for both breeding and migrating birds. Larger reservoirs including Flaming Gorge, Fontenelle, and Boysen support significant numbers during migration periods. Western mountain valleys and high elevation lakes are particularly important for breeding birds. Southern and eastern lowlands host migrating birds during spring and fall but few breeding birds. TheWyoming wildlife guideprovides details on bufflehead locations and viewing areas. Nested valleys in the Absaroka and Teton ranges support isolated breeding populations. Seethe Bufflehead guide for Wyomingfor more.

Season and Timing for Wyoming Buffleheads

Buffleheads display a distinct seasonal pattern in Wyoming tied to water availability and ice formation. Spring migration brings northbound birds through March and April, with peak numbers in mid-April as birds move toward breeding grounds. Early breeding birds begin arriving on mountain lakes in April. Summer breeding season runs from May through August, with peak breeding activity in June and July. Fall migration starts in August as water temperatures cool and breeding season concludes. Migration peaks in September and early October as birds move southward toward winter grounds. By November, most breeding birds have departed for lower elevation areas and southern wintering grounds. Some buffleheads remain on ice-free sections of rivers and larger reservoirs through winter. Early returning migrants may appear again by late February and March. The timing makes Wyoming valuable for observing buffleheads during multiple seasons.

How to Identify a Bufflehead

Buffleheads are among the smallest diving ducks in North America, roughly robin-sized with very compact and rounded body proportions. Males are strikingly patterned with white bodies and black backs, featuring a large white head patch that contrasts dramatically with the black crown and face. The distinctive head pattern is the most obvious identifying feature on males. Females are much duller, with grayish-brown bodies and a small white spot behind and below the eye. Both sexes have small, delicate bills proportional to their diminutive size. The head shape is notably rounded and puffy in both sexes. Their small size makes them easily distinguished from other diving ducks on Wyoming waters. In flight, males display white wing patches and back. Both sexes produce soft quacking calls and whistling sounds produced by their wings. Males in courtship display their head in dramatic puffing and head-throwing postures.

Where Bufflehead Sightings Concentrate in Wyoming

The highest bufflehead concentrations in Wyoming occur on mountain lakes during breeding season, particularly in the Greater Yellowstone Ecosystem and surrounding high elevation lakes. Yellowstone Lake supports numerous breeding pairs. The Bighorn Basin includes multiple lakes that attract significant breeding populations. Absaroka Mountains lakes and high elevation valleys host concentrating breeding birds. During migration, concentrations build on larger reservoirs including Flaming Gorge and Boysen Reservoir. The North Platte River valley attracts migrants during spring and fall. Eastern Wyoming mountain lakes including those in the Black Hills region host smaller but consistent breeding populations. Lower elevation reservoirs serve as staging areas for migrants in spring and fall. Wind River and Green River valleys support migrating birds. Public access areas near dam spillways often provide good viewing opportunities. CheckWyoming wildlife pagesfor specific access information. Early morning observations typically provide the best sighting opportunities.

Typical Bufflehead Behavior

Buffleheads are diving ducks that spend nearly all time on water, diving to depths of 10 to 30 feet to find food on lake and river bottoms. In Wyoming, they feed primarily on small aquatic invertebrates, small fish, and fish eggs. During breeding season, they consume more insects as food becomes abundant. Buffleheads are highly mobile and often shift locations as conditions change through seasons. Males and females may occupy separate areas during certain times of year. During migration they sometimes associate with other small duck species in mixed flocks. Buffleheads are relatively quiet compared to many duck species, producing soft quacking calls and distinctive wing whistles. They are alert and take flight quickly when threatened, using rapid wing beats for swift takeoffs. On water they display active feeding throughout daylight hours. They rest at night on open water away from shore and predators. Breeding birds pair up in late winter and engage in elaborate courtship displays on Wyoming lakes in spring.

Coexistence and Legal Protections

Buffleheads are fully protected under federal law as migratory waterfowl and cannot be hunted in Wyoming. The population remains healthy and stable throughout the state. Wyoming boaters and waterfront residents should be aware of buffleheads and avoid disturbing them, particularly during vulnerable breeding and migration periods. Approach slowly and quietly, maintaining distance to allow birds to feed, rest, and nest. Preserve their energy by keeping respectful space, especially important during demanding breeding and migration seasons. Habitat protection is critical, particularly the conservation of mountain lakes and reservoirs where breeding occurs and the protection of river valleys used during migration. Pesticide and pollution reduction near water bodies supports the invertebrates that buffleheads depend on for food. If you encounter sick or injured buffleheads, contact the Wyoming Game and Fish Department. Supporting watershed protection and wetland conservation initiatives benefits buffleheads and all waterfowl. Learn more atnational wildlife resources.

Species People Confuse with Buffleheads

The Hooded Merganser is the species most frequently confused with buffleheads in Wyoming, as both are small diving ducks. However, Hooded Mergansers are noticeably larger with longer, thinner bills adapted for catching fish. Males have a distinctive white head crest bordered in black, differing from bufflehead's pattern. Pied-billed Grebes are small diving waterbirds found on Wyoming waters that might be mistaken for buffleheads at distance, but they have different body shapes and lack typical duck bills. Teal species, particularly Green-winged Teal, are small dabbling ducks that might cause confusion. Unlike buffleheads, teal dabble at the surface rather than diving. Other small diving duck species are typically larger with different plumage patterns. The striking size difference and dramatic male coloring make bufflehead identification generally straightforward. Female buffleheads are more challenging to identify and require careful observation to distinguish from similar species like female Hooded Mergansers.

Frequently Asked Questions About Buffleheads

What does the bufflehead's name mean? The name comes from buffalo head, referring to the distinctive puffy head displayed by males during courtship and display. Where do Wyoming buffleheads build their nests? Buffleheads nest in tree cavities, often in old woodpecker holes in trees near water on mountain lakes and along river valleys. How high do buffleheads breed in Wyoming? Breeding birds occur at elevations ranging from about 4,000 feet in lower valleys to over 7,000 feet on high mountain lakes. Why are buffleheads so rare in the lowlands of Wyoming? Lowland areas of Wyoming lack the specific habitat requirements of buffleheads, particularly suitable nesting cavities and the food-rich waters they prefer. ExploreWyoming wildlife resourcesto learn about other waterfowl species and the diverse migratory patterns you might observe throughout the state.

Plan your bufflehead sighting in Wyoming

12,596 verified bufflehead records have been logged in Wyoming, most recently in 2026. See the GBIF records.

Where to look in Wyoming

Birding hotspots via eBird (Cornell Lab).

Planning a trip to see bufflehead? Find places to stay near Bighorn Canyon National Recreation Area on Booking.com.

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