Least Bittern (Ixobrychus exilis)

Group Bitterns and Herons
Code ABNGA02010
Order Ciconiiformes
Family Ardeidae
Author (Gmelin, 1789)
Rank G5 (definitions)
Occurrence SM (definitions)
Scale C (definitions)

County List:

Western UP Delta, Gogebic, Houghton, Menominee
Eastern UP Mackinac, Schoolcraft
Northern LP Alpena, Arenac, Bay, Benzie, Charlevoix, Cheboygan, Isabella, Leelanau, Manistee, Mason, Midland, Newaygo, Oceana, Presque Isle, Roscommon
Southern LP Allegan, Barry, Berrien, Branch, Calhoun, Cass, Genesee, Gratiot, Huron, Ionia, Jackson, Kalamazoo, Kent, Lapeer, Livingston, Macomb, Monroe, Montcalm, Muskegon, Oakland, Ottawa, Saginaw, St. Clair, St. Joseph, Tuscola, Van Buren, Washtenaw

Rule:

Mixed Forested/Nonforested or Nonforested Landscapes

      Any Emergent Wetland 
      or Lowland Brush
view decision rule term definitions

Habitat List:

Habitats Regen Sap Pole Sm Saw Lg Saw Uneven
Aspen nonononono-
Paper Birch nonononono-
Oak nononononono
Assorted Hardwoods nononononono
Northern Hardwoods nononononono
Spruce/Fir nononononono
Hemlock nononononono
Jack Pine nononononono
Red Pine nononononono
White Pine nononononono
Conifer Plantations nonononono-
Mixed Upland Hardwoods nononononono
Mixed Northern Hardwoods nononononono
Mixed Upland Conifer nononononono
Mixed Pine nononononono
Swamp Hardwoods nononononono
Balsam Poplar & Swamp Aspen & Swamp Birch nononononono
Bottomland Hardwoods nononononono
Tamarack nononononono
Northern White Cedar nononononono
Black Spruce nononononono
Mixed Lowland Hardwoods nononononono
Mixed Lowland Conifer nononononono
Non-ForestedMarsh 1, Marsh 2 (MARSH), Lowland Brush
Special FeaturesRiparian

view size class definitions

Literature:

Adams, R. J. Jr. 1991. Least Bittern. Pages 106-107 In: R. Brewer, G. A. McPeek, and R. J. Adams, Jr. (eds.) The atlas of breeding birds of Michigan. Michigan State University Press, East Lansing. 594 pp.

Habitat: It prefers areas of emergent vegetation with deeper water levels than favored by the American Bittern but usually less than one meter. Heavy growths of cattail, bulrush, wild rice, burreed, water smartweed, and reeds are favored feeding sites for its diet of small fish, dragonflies, and other aquatic insects, crayfish, tadpoles, and snails.

Nests are platforms built in dense clumps of vegetation 0.15-0.75 m above water. Cattails, bulrushes, sedges, reeds, and occasionally small trees or bushes like willow or buttonbush support the platform.


DeGraaf, R. M. and D. D. Rudis. 1986. New England wildlife: habitat, natural history, and distribution. GTR NE-108. Broomall, PA:USDA, Forest Service, Northeastern Forest Experiment Station. 491 pp.

Habitat: Fresh, brackish, and , less frequently, salt water wetlands. Prefers marshes with tall vegetation such as cattails, sedges, and scattered bushes.

Special Habitat Requirements: Deep marshes with clumps of emergent vegetation.


Kaufman, K. 1996. Lives of North American Birds. Houghton Mifflin Company, Boston, Massachusetts. 675 pp.

Habitat: Fresh marshes, reedy ponds. Mostly freshwater marsh but also brackish marsh, in areas with tall, dense vegetation standing in water. May be over fairly deep water, because it mostly climbs in reeds rather than wading. Sometimes in salt marsh or in mangroves.

Diet: Mostly fish and insects. Eats mostly small fish (such as minnows, sunfish, and perch) and large insects (dragonflies and others); also crayfish, leeches, frogs, tadpoles, small snakes, and other items.

Nest: Site is well concealed in tall marsh growth. Nest is platform created by bending down marsh vegetation, adding sticks and grass on top.