Gulls in Indiana: How to Identify the State’s 3 Most Common Species
September 24, 2026
Indiana sits nowhere near an ocean, yet gulls in Indiana gather by the thousands every winter, wheeling over Lake Michigan, crowding shopping-center parking lots, and diving into inland reservoirs hundreds of miles from saltwater. In Indiana, gulls are widespread, mainly found in ponds, lakes, rivers, and shopping center parking lots.
Most Hoosiers lump them all together as “seagulls,” but a closer look reveals distinct species with their own migration schedules, breeding habits, and field marks. This guide covers the three gulls a Hoosier birdwatcher is most likely to encounter: the Ring-billed Gull, the Herring Gull, and the smaller, more delicate Bonaparte’s Gull.
Each section breaks down what to look for, where the bird spends its time in Indiana, and how to avoid the identification mix-ups that trip up even experienced birders. For a broader look at the family these birds belong to, the different types of gulls found across North America share many of the same traits described below.
1. Ring-billed Gull
The Ring-billed Gull (Larus delawarensis) is the species most Hoosiers picture when they hear the word “gull.” Ring-billed Gulls can be identified by their white head and body, gray wings, black wing tips, yellow legs, and yellow bill with a black “ring” around it. According to the Cornell Lab of Ornithology’s All About Birds identification guide, the species has a fairly short, slim bill and long, slender wings that extend well past its tail when perched.
Plumage changes quite a bit with age. Nonbreeding adults look mostly the same as breeding adults but with tan streaking on the head and neck, while juvenile Ring-billed Gulls are white with brown and tan mottling, and their bills are pinkish with a dark tip instead of a ring. That pink, dark-tipped juvenile bill is a common source of confusion with young Herring Gulls, so pairing bill color with overall body size helps narrow things down.
Status-wise, this is Indiana’s baseline gull. The Ring-billed Gull is a year-round resident and abundant winter visitor in Indiana, with northern migrants flooding the state from November through March. Birders tracking migrating birds in Indiana will notice Ring-billed numbers swell dramatically once Canadian and Great Lakes breeders arrive for the colder months.
Pro Tip: Indiana Audubon recommends looking at wingtip feathers rather than the head or legs first. As the group explains, learning the topography of a gull’s primaries makes sorting through look-alike species much faster than hunting for bill or leg color alone.
Breeding colonies are one of the more surprising parts of this bird’s Indiana story. Along the Lake Michigan shoreline, the largest breeding colony sits right in Indiana, hidden within the region’s steel mills, where over 32,000 gulls nest side by side in cramped conditions. That figure comes from a 2011 survey, since numbers fluctuate yearly and the last comprehensive count was conducted that year.
Ring-billed Gulls are also opportunistic to a fault. They’re known for dropping and then re-catching prey, a “game” that helps hone their hunting skills. Even more striking, the species uses a sort of built-in compass to navigate, and scientists found that chicks as young as two days old already showed a preference for magnetic bearings leading toward their winter habitat.
Where to find them: Ring-billed gulls generally winter around larger bodies of water in rural areas like Bloomington’s Lake Monroe or Turtle Creek Reservoir in Merom, according to the Terre Haute Tribune-Star. Volume can be enormous at these inland sites; during the 2017–18 Christmas Bird Count, observers tallied a big total of 7,877 Ring-billed Gulls at Lake Monroe alone. Anyone already scouting the reservoir for a day of trout fishing in Indiana has a decent shot at watching flocks work the shoreline at the same time.
2. Herring Gull
Larger and heavier than its ring-billed cousin, the American Herring Gull (Larus smithsonianus) is Indiana’s classic “big gull.” It’s a barrel-chested bird with pink legs in every plumage, and in flight it looks noticeably broader-winged than a Ring-billed Gull. Cornell’s Herring Gull identification page notes that breeding adults show light-gray backs, black wingtips, and yellow eyes, while dusky streaks mark their heads in winter.
Reaching full adult plumage takes patience for this species. American Herring Gulls take four years to reach adult plumage: juveniles are mottled brown, second-year birds are brown with gray starting to show on the back, and third-years have even more gray plus more white on the head and underparts. That slow, four-stage transformation is a big reason Herring Gulls confuse newer birders more than any other Indiana species.
Common Mistake: Don’t rely on bill color alone. Sub-adult Herring Gulls sometimes show a mostly yellow bill with black near the tip, which makes them look similar in coloration to a Ring-billed Gull. Body size and wing bulk are far more reliable clues at this stage.
Herring Gulls rank among Indiana’s most numerous winter gulls. Herring Gulls are one of the most abundant gull species in the state, especially in winter. Indiana Audubon points out that this abundance cuts both ways for birders: the American Herring Gull is often confused with the state’s rarer winter visitors, so knowing this species well and learning to exclude it from an identification scenario becomes valuable as gulling interest grows.
Feeding style mirrors the bird’s scrappy reputation. American Herring Gulls patrol shorelines and open water, picking scraps off the surface, and they rally around fishing boats or refuse dumps as loud, competitive scavengers happy to snatch another bird’s meal. That opportunistic streak connects to a broader pattern seen across the region’s waterfowl and shorebirds; anyone curious about the full range of foraging strategies can compare notes with the guide on what birds eat to survive.
For viewing locations, Northwest Indiana is the epicenter. A couple of great sites near the dunes to see wintering gulls include Michigan City Harbor, Port of Indiana, and the Whiting BP Refinery Beach. The same steel-mill colonies that host nesting Ring-billed Gulls occasionally turn up Herrings too, since occasional Herring Gull and Caspian Tern can be found mixed in among the Ring-billed colonies hiding within the mills. In terms of scale, adult Herring Gulls fall well short of the continent’s true giants; readers curious how gulls stack up against other heavyweight species can check the roundup of the largest birds in North America.
3. Bonaparte’s Gull
Bonaparte’s Gull (Chroicocephalus philadelphia) is the odd one out on this list, a small, tern-like bird that barely resembles the hulking Herring Gull sharing the same lakeshore. It’s actually the third smallest species of gull, behind only the Little Gull and Saunder’s Gull, and Cornell’s guide places it as larger than a Common Tern but smaller than a Ring-billed Gull.
Breeding plumage is unmistakable if you catch it. Adults have black heads and red legs in summer, while in winter they show a neat gray smudge near the ear instead. In flight, the species gives itself away instantly: Bonaparte’s Gulls fly with ternlike agility, flashing bright white primaries that form a distinctive white wedge in the upperwing. That buoyant, darting flight style is a sharp contrast to the steady, gliding wingbeats of a Herring Gull.
Key Insight: Unlike every other gull on this list, Bonaparte’s Gull rarely nests on the ground. The species is unusual among gulls in its use of trees for nesting, building stick platforms in the boreal forest far north of Indiana before its young ever see a lakeshore.
Diet shifts with the seasons. During the breeding season, Bonaparte’s Gull feeds mainly on insects, often catching them on the wing. Once migration begins, the menu changes: in the nonbreeding season, the birds form tight, swift flocks that feed largely on small fish by dipping and diving, sometimes stealing fish from other birds. That aerial hunting style puts them in the same conversation as some of the continent’s most agile flyers, a topic covered in more depth in the guide to the fastest birds.
Indiana sits along a well-used migration corridor for this species. Indiana is home to a wide variety of gull species, and Bonaparte’s Gull appears reliably during spring and fall passage and in smaller numbers through winter wherever open water persists on the Great Lakes and larger inland lakes. Because it favors different water types than the state’s bulkier gulls, comparing notes with birders who track the water birds found in Texas can be a useful exercise in seeing how the same species behaves at the far end of its wintering range.
Comparing Indiana’s Three Common Gulls
| Feature | Ring-billed Gull | Herring Gull | Bonaparte’s Gull |
|---|---|---|---|
| Relative size | Medium, pigeon-bodied with long wings | Large, barrel-chested | Small, tern-like |
| Bill | Yellow with black ring | Thick yellow bill, red mark near tip | Thin, black |
| Leg color | Yellow | Pink at all ages | Pink (winter) to red (breeding) |
| Indiana status | Year-round resident, abundant in winter | Abundant winter visitor | Migrant, scarce in winter |
| Best places to look | Lake Monroe, Turtle Creek Reservoir, parking lots | Michigan City Harbor, Port of Indiana, Whiting BP Refinery Beach | Open lakes and rivers during migration |
Beginners often start their gull-watching year confused by all three species standing together on the same beach. Working through the primaries trick, checking leg color, and noting overall bulk in that order clears up most identification headaches within a season or two. Anyone building out a broader Indiana birding list can round out the trip with the state’s woodpeckers and other resident species that share the same wetland and lakeshore habitat gulls prefer, or branch out to the state’s butterflies during the warmer months when gull numbers thin out.
None of these three species requires a coastal trip or expensive gear to observe. A pair of binoculars, a winter visit to Lake Monroe or the Indiana Dunes shoreline, and a little patience with the age-related plumage changes described above are enough to start telling Ring-billed, Herring, and Bonaparte’s Gulls apart on sight. Once that foundation is solid, the rarer winter visitors that occasionally mix into Indiana’s gull flocks become a lot easier to spot too.