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Giant Ichneumon Wasp (Megarhyssa spp)


Detailing the physical features, habits, territorial reach and other identifying qualities of the Giant Ichneumon Wasp.


 Updated: 1/27/2018; Authored By Staff Writer; Content ¬©www.InsectIdentification.org



  Giant Ichneumon Wasp  
Picture of Ichneumon-Wasp


The intimidating female Ichneumon Wasp has a tremendously long ovipositor that is used for egg-laying, not for stinging.





There are several different species of Ichneumon Wasp, each with its own color variations. Some are black and yellow, others reddish and striped. All have the Ichneumon Wasp body shape: a thin waist and an abdomen longer than the rest of the body. Members of the family Ophion have abdomens that are shorter than Megarhyssa, but they are still long in comparison to more familiar wasps.

Females may have a long, needle-like ovipositor which is often mistaken as a stinger. The sturdy ovipositor acts like a syringe, injecting eggs deep into wood (live trees, or logs) where the larvae will feed on any other insect larvae already deposited there. It is not uncommon to see females poking around wood in an attempt to find a good place to deposit her eggs. Males do not have the ovipositor so their abdomen ('tails') are shorter. Both genders are still wasps, however, and capable of stinging if threatened.

See a female in motion here:


Giant Ichneumons tend to live in wooded areas and throughout all of North America, though they do stay away from the arid and hot desert regions and featureless plain states.

Ichneumon adults do not eat at all. Larvae are parasites of Pigeon Horntail larvae, another type of wasp that deposits eggs in wood. The Ichneumon larvae will hatch and feed on the Horntail Wasp larvae.

Variations of the Ichneumon include the Eastern Giant Ichneumon, the Lunar Giant Ichneumon and the Western Giant Ichneumon. These can all be found in their respective habitats consisting of Canada, the United States of America and Mexico. This is truly a North American insect!
Basic Information
Common Name: Giant Ichneumon Wasp
Scientific Name: Megarhyssa spp
Category: Bee, Ant, Wasp and Similar


General Identification
Size (Adult; Length): 10mm to 19mm (0.39in to 0.74in)
Colorwheel Graphic
Identifying Colors: brown; yellow; black; orange; red, white
Additional Descriptors: long, tail, stinger, stinging




Taxonomic Hierarchy
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Ichneumonidae
Genus: Megarhyssa
Species: spp


Ant, Bee and Wasp Anatomy
Graphic showing basic anatomy of both a bee and an ant insect
1
Antennae: Ants and Bees both have a pair of antennae on the head that senses their surroundings.
2
Head: The head contains the insect's compound eyes, antennae, and mandibles.
3
Thorax: Contains various vital parts such as the aorta and nervous system.
4
Abdomen: Contains various organs including the heart, gut, venom glands, and anus.
5
Legs: Ants and Bees have three pairs of legs attached to the thorax (center-body section).
NOTE: Ants, Bees and Wasps are part of the Hymenoptera order because they share many similarities.


Territorial Reach (A-to-Z)
Note: An insect's reach is not limited by lines drawn on a map and therefore species may appear in areas, regions and/or states beyond those listed below as they are driven by environmental factors (such as climate change), available food supplies and mating patterns. Grayed-out selections below indicate that the subject in question has not been reported in that particular territory. U.S. states and Canadian provinces / territories are clickable to their respective bug listings.
Alabama
Alaska
Arizona
Arkansas
California
Colorado
Connecticut
Delware
Florida
Georgia
Hawaii
Idaho
Illinois
Indiana
Iowa
Kansas
Kentucky
Louisiana
Maine
Maryland
Massachusetts
Michigan
Minnesota
Mississippi
Missouri
Montana
Nebraska
Nevada
New Hampshire
New Jersey
New Mexico
New York
North Carolina
North Dakota
Ohio
Oklahoma
Oregon
Pennsylvania
Rhode Island
South Carolina
South Dakota
Tennessee
Texas
Utah
Vermont
Virginia
Washington
West Virginia
Wisconsin
Wyoming
Canadian National Flag Graphic
Alberta
British Columbia
Manitoba
New Brunswick
Newfoundland and Labrador
Nova Scotia
Ontario
Prince Edward Island
Quebec
Saskatchewan
Mexican National Flag Graphic
Mexico


Territorial Area Map (Visual Reference Guide)
The map below showcases (in red) the states and territories of North America where the Giant Ichneumon Wasp may be found (but is not limited to). This sort of data can be useful in seeing concentrations of a particular species over the continent as well as revealing possible migratory patterns over a species' given lifespan. Some species are naturally confined by environment, weather, mating habits, food resources and the like while others see widespread expansion across most, or all, of North America.
Alaska  
Hawaii  
Prince Edward Is.  
State of Alabama graphic
State of Arizona graphic
State of Arkansas graphic
State of California graphic
State of Colorado graphic
State of Delware graphic
State of Florida graphic
State of Georgia graphic
State of Idaho graphic
State of Illinois graphic
State of Indiana graphic
State of Iowa graphic
State of Kansas graphic
State of Kentucky graphic
State of Louisiana graphic
State of Maine graphic
State of Maryland graphic
State of Michigan graphic
State of Minnesota graphic
State of Mississippi graphic
State of Missouri graphic
State of Montana graphic
State of Nebraska graphic
State of Nevada graphic
State of New England graphic
State of New Jersey graphic
State of New Mexico graphic
State of New York graphic
State of North Carolina graphic
State of North Dakota graphic
State of Ohio graphic
State of Oklahoma graphic
State of Oregon graphic
State of Pennsylvania graphic
State of South Carolina graphic
State of South Dakota graphic
State of Tennessee graphic
State of Texas graphic
State of Utah graphic
State of Virginia graphic
State of Washington graphic
State of West Virginia graphic
State of Wisconsin graphic
State of Wyoming graphic
Canadian territory of Alberta graphic
Canadian territory of British Columbia graphic
Canadian territory of Manitoba graphic
Canadian territory of New Brunswick graphic
Canadian territory of Newfoundland and Labrador graphic
Canadian territory of Ontario graphic
Canadian territory of Quebec graphic
Canadian territory of Saskatchewan graphic
Territory map graphic of the country of Mexico
Contiguous United States shape map layer graphic


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