9 Types Of HERONS In Wisconsin (ID Guide With Photos)
Did you recently come across a heron in the state of Wisconsin, and want to know what species it was?
Identifying herons in the Badger State is not as easy as it might seem, since there are many heron species in Wisconsin (as well as closely related egret and bittern species).
To help you identify the bird you saw, we’ll cover the most common herons of Wisconsin in this article.
What are the types of herons in Wisconsin?
The 9 types of herons found in Wisconsin are:
- Great Blue Heron
- Black-crowned Night-heron
- Green Heron
- American Bittern
- Least Bittern
- Great Egret
- Snowy Egret
- Cattle Egret
- Yellow-crowned Night-Heron
While some of these herons are year round residents of Wisconsin, others are summer visitors in the state during the breeding season
Finally, some are scarce vagrants that are rarely seen in the state (more on that below).
Now let’s dive into the details, and take a closer look at each of these Wisconsin herons:
Great Blue Heron
Scientific name: Ardea herodias
With a wingspan of up to 6 feet, this heron is one of Wisconsin’s largest birds. It is almost entirely blue gray, except for a white throat and eye stripe, as well as dark gray wing feathers.
Great Blue Herons can be found in many wetland habitats. You can find them in both saltwater and freshwater marshes, flooded fields, mangrove swamps, and lake shorelines.
The Great Blue Heron is the most common type of heron found in Wisconsin
This enormous blue bird likes to hunt for small fish by wading in the shallows of estuaries, mud flats and marshes along the seaboard.
This heron spends a lot of time standing motionless in shallow water, where it waits patiently for a suitably sized fish to come close enough to be grabbed with its long, yellow bill.
The Great Blue Heron is the most common heron found in Wisconsin, where it can be seen year round.
Fun fact: Old heron nests are sometimes used by owls, as well as other types of birds of prey in Wisconsin. These birds appropriate heron nests instead of building their own.
Black-crowned Night Heron
Scientific name: Nycticorax nycticorax
The Black-crowned Night-Heron is true to its name, and is most active at dusk and during the night, when it forages for frogs and small fish in Wisconsin wetlands.
These night-herons are common breeding birds in Wisconsin. They are summer visitors in northern and western Wisconsin, but can be found year-round in east Wisconsin.
These herons can be hard to spot during the day, unless you find their day-time hiding spots.
Another great distinguishing feature of this night bird in Wisconsin are its loud squawking bird sounds, which it utters at dusk when it flies out from its roost.
The mating season is marked by a change in appearance of this heron, with the black color of the head and back transforming into a glossy greenish blue.
In addition, the lores become black, while their feet take on a pink or crimson hue.
Black-crowned Night Herons are social birds, and usually nest in colonies that share the same nesting tree.
Related: The black birds of Wisconsin
Scientific name: Butorides virescens
The Green Heron is a relatively common water bird in Wisconsin. It’s a medium-sized heron with an olive-green body and black wings.
These herons tend to live near water, so they’re often seen around lakes, rivers, ponds, or even swimming pools.
They eat fish, frogs, snails, small reptiles, amphibians, and crustaceans. They nest in trees or shrubs but sometimes build their nests on islands.
The Green Heron is usually silent except at dusk or dawn, when it makes its characteristic call, which sounds like “kreee.”
Green Herons usually build their nests out of thin twigs, and place them in the crowns of large trees close to water.
However, if suitable nesting trees are not available, they can also nest on the ground, usually underneath a bush.
Scientific name: Botaurus lentiginosus
American Bitterns are small herons that live in marshes and swamps, and are extremely well camouflaged to blend in with aquatic vegetation.
They can blend in with the reeds surrounding them thanks to their mottled brown color, as well as the way they hold their heads pointed upwards while remaining still amid the reeds.
Bitterns have a neck that is similar in length to the rest of their body, which they use to catch small fish and other animals in shallow water.
This heron species is endangered in Wisconsin
Since these water birds are very secretive, the best way to identify a bittern is by its call, which sounds similar to “oonk-ka-oonk.”
American Bitterns eat a wide variety of aquatic organisms, including fish, crabs, insects, frogs, and small rodents.
They wait patiently in the reeds for their prey to approach before making a swift, quiet dash forward to catch it in their bills.
These small herons are summer visitors in Wisconsin, and can be found throughout the state anywhere there are suitable habitats.
Scientific name: Ixobrychus exilis
The Least Bittern is hard to spot, since it usually remains hidden in dense reed beds. The best way to identify one of these herons is by its coo-coo-coo call.
If you do get your eyes on a Least Bittern, you’ll be pleasantly surprised by their attractive chestnut orange and black color.
The best places to see these herons are marshes and wetlands with dense vegetation, where they can be observed hunting at the edges of open water.
These bitterns are most active at dawn and at dusk, when they can also be seen flying to and from their roosting trees.
Least Bitterns feed on fish, amphibians, molluscs, insects, and even rodents..
They forage by grasping individual reeds with their claws while waiting for small aquatic animals to pass by in the water underneath them.
Least Bitterns perch on the reeds and bend their bodies in all sorts of ways to reach their meal floating below.
They are regular breeding birds and summer visitors in the state of Wisconsin.
Scientific name: Ardea alba
While the Great Egret is a rare breeding bird in Wisconsin, it is more often observed in the state outside of the breeding season, and especially during fall migration.
This bird is almost entirely white, except for its long, black legs and yellow beak.
During the spring and summer breeding seasons, the Great Egret grows a long white plume on its back that extends all the way to the tip of its tail.
This heron lives in both fresh and saltwater habitats, and often nests in large colonies on the shores of marshes, lakes, and rivers.
Great Egrets forage in any type of shallow water, including ponds, lakes, rivers, estuaries, as well as rice fields and other flooded areas.
In areas with shallow water, you can observe Great Egrets waiting patiently for their prey before striking with their long beak and spearing it.
Great Egrets build their nests in colonies. Most of the time, they are built high up in mature trees, often on islands, to keep ground predators from getting to the eggs.
This bird is especially prevalent in the eastern and southern regions of the state. Outside of the breeding season it can be seen in large flocks.
Scientific name: Egretta thula
The Snowy Egret is another bird with extensive white plumage that doesn’t breed in Wisconsin, but that can be regularly observed during fall migration.
This little white heron stands out due to its slim black bill and bright area between the eyes and nostrils.
In adult birds, the legs are totally black, which contrasts with their yellow feet. It is thought that the brightly colored feet help to attract small fish and other prey.
The legs of juvenile birds have a predominant greenish yellow color, with some black areas on the front of the leg.
This bird is found in practically all types of wetland environments, from small ponds to saltwater shorelines and everything in between.
Snowy Egrets feed on fish, crabs, snails, amphibians, and crayfish, which they find in shallow water.
These herons either remain completely still and wait for prey to approach, or they stir up the water with their feet to flush out prey to the surface.
Their nests can be found in trees or hidden among ground-level bushes. The female lays 3 to 6 eggs, which are subsequently incubated by both the male and female.
During the summer, the Snowy Egret is very rare in Wisconsin, but is more commonly observed in the state during the months after the breeding season, due to post-breeding dispersal.
Scientific name: Bubulcus ibis
Smaller than Great Egrets, Cattle Egrets have shorter necks and are mostly white with streaks of brownish orange on the head, throat, and back.
The Cattle Egret is a relatively new species in the New World that originated in Europe and Africa.
Nobody knows how these herons crossed the Atlantic, but they were first discovered breeding in Brazil, and later in the southern USA.
Cattle Egrets have been very successful at colonizing the Americas, and are common breeding birds all over the southern states.
In contrast to other egrets and herons, Cattle Egrets regularly forage in dry habitats, including high altitude areas.
This is a small egret that is entirely white, except for the breeding season, when adults develop orange plumage on the back of their head, back, and chest.
The legs and the beak are yellow, but at the peak of the breeding season, these herons take on a ruddy hue.
It inhabits a wide range of wetland ecosystems, ranging from shallow saltwater zones to freshwater ponds, swamps, and lakes.
In addition to wetlands, the Cattle Egret also does a significant amount of its foraging in dry areas, such as pastures, where it likes to follow cattle and feed on the insects disturbed by the livestock.
Similar to other egret species, the Cattle Egret can be observed in Wisconsin during the post-breeding dispersal phase, where individuals can often be seen far north of their breeding range.
Scientific name: Nyctanassa violacea
The Yellow-crowned Night-Heron is not quite as nocturnal as its Black-crowned relative, and can be seen foraging both during the day and the night.
These herons don’t breed in Wisconsin, but they are regular vagrants in the state, as they have nearby breeding populations in Wisconsin, Illinois, and Indiana.
While crustaceans make up the bulk of the Yellow-crowned Night-Herons’ diet, they also eat fish, insects, snails, reptiles, amphibians, and rodents.
They are migratory birds that spend the winter in Central America and the Caribbean.
Do herons stay in Wisconsin during the winter?
The only heron that stays in Wisconsin during winter is the Great Blue Heron. All other heron species migrate south in fall and spend the winter in southern US states or in Central America.
And while the Great Blue Heron does winter in Wisconsin, it can be forced to leave the state during severe cold spells that cause all lakes and rivers to freeze over. In cases like that it flies south until the weather warms up again.
And there we have the herons found in the state of Wisconsin.
The varied habitats of Wisconsin are home to more than 300 different species of birds, and herons make up a significant proportion of this rich avifauna.
Including herons, egrets and bitterns, these birds play a vital role in the ecology of their habitats.
If you enjoyed this article, check out our guide to the common birds of Wisconsin.