There are two bittern species in the United States, the American Bittern and the smaller Least Bittern. Both species are generally shy and spend most of their time in weeds and cattails in wetland areas.
American Bittern – 28 inches
The American Bittern is fairly large, distinctive in appearance and not easily confused with other species. Photograph © Greg Lavaty
The American Bittern’s profile and color pattern help it bend in with its environment. Photograph © Sam Crowe
When disturbed, the American Bittern will often stand very still with its bill pointed upward, in imitation of the surrounding reeds. Photo © Sam Crowe
While American Bitterns have a strong affinity for wetland areas they can show up in some strange locations during migration. They also have a very unusual call.
Least Bittern – 13 inches
The small Least Bittern can often be observed working the edges of reeds and cattails. Photograph © Greg Lavaty
Juveniles and adults similar. Juveniles have browner backs and more pattern on the wings. Photograph © Sam Crowe
The brown back with pale streaks on the juvenile. Photo © Sam Crowe
Note the very short tail. Photograph © Greg Lavaty
Tracy
Saturday 8th of July 2023
Why are they attracted to my adult chickens.
Patrick O'Donnell
Monday 10th of July 2023
@Tracy- It's hard to say but as with most wild animals, bitterns and other birds are usually attracted to food, or, the possibility of food. They might find some bugs or other small animals near the chickens, or, might try and snatch a young chick (yikes!). Or, the heron might be attracted to the sound and movements of the chickens in general and associate that with the possibility of food.