oblong-winged katydid

(Amblycorypha oblongifolia)

               
Conservation Status

IUCN Red List

not listed

oblong-winged katydid

 

NatureServe

NNR - Unranked

Minnesota

not listed

Occurrence

 

Flight/Season

One generation per year: June through September

Habitat

Deciduous forests, gardens

Size

Total Length: 1 to 2 (42 to 52 mm)

Photo by Norm & Peg Dibble
 
Identification

Oblong-winged katydid is a long-horned, round-headed katydid (genus Amblycorypha). It occurs in eastern North America, Mexico, and Central America. In the United States it is common east of the Great Plains. It is found mostly in damp areas on trees, shrubs, and tall weeds in the understory of deciduous forests, at the edges of thickets, and in gardens.

At 1 to 2 (42 to 52 mm) long, oblong-winged katydid is the largest round-headed katydid. Their overall color varies but is genetically inherited. The head, body, wings, and legs are usually leaf green, occasionally yellow, rarely tan, orange, brown, or pink.

The head is oval. The top of the head is rounded and strongly curved backward. The face is vertical. The eyes are oval. The antennae are very long and extend well beyond the tip of the abdomen. They are thread-like and have many segments. They are attached high on the face and far apart. The forehead projects forward between the antennae.

The leathery forewings (tegmina) are elongated-oval and 3.1 to 4 times as long as wide. They are held roof-like over the body. A small area at the base of the wing is horizontal and very dark. On the male, this is the stridulatory field. There is a row of bumps (a file) on the underside of the upper wing and a sharp edge (blade) on the upper side of the lower wing. By rubbing the file against the blade, the male produces its distinctive song, a short, high-pitched, 9 kHz “zeee-dik!” that is repeated every few seconds. The female wings are similar but do not have these two sound-producing structures.

The hindwings are membranous, broad, and long. They are folded fan-like under the tegmina when at rest. They are longer than, and not completely covered by, the tegmina.

On the female the ovipositor is shorter than the abdomen, flattened, curved upward.

The front legs are short, the middle legs a little longer, the hind legs much longer. The third segment (femur) of the hind leg extends almost but not quite to the tips of the tegmina. The end section of the leg (tarsus), corresponding to the foot, has four segments.

 
Similar
Species

 

 
Nymph Food

Same as adults

 
Adult Food

Leaves of deciduous plants

 
Life Cycle

Eggs are deposited in the soil.

 
Behavior

 

 
Distribution Distribution Map  

Sources: 24, 27, 29, 30.

 
Comments

 

 
Taxonomy

Order:

Orthoptera (grasshoppers, crickets, katydids)

 

Suborder:

Ensifera (crickets and katydids)

 

Infraorder:

Tettigoniidea

 

Superfamily:

Tettigonioidea

 

Family:

Tettigoniidae (katydids)

 

Subfamily:

Phaneropterinae (broad-winged katydids)

 

Tribe:

Amblycoryphini

 
Synonyms

 

 
Common
Names

oblong-winged katydid

 

 

 

 

 

Glossary

Femur

On insects and arachnids, the third, largest, most robust segment of the leg, coming immediately before the tibia. On humans, the thigh bone.

 

Ovipositor

A long needle-like tube on the abdomens of some female insects, used to inject eggs into soil or plant stems.

 

Tarsus

The last two to five subdivisions of an insect’s leg, attached to the tibia; the foot. Plural: tarsi.

 

Tegmen

The modified, leathery front wing of grasshoppers and related insects that protects the hindwing. It may also serve as a camouflage, a defensive display, or a sound board. Plural: tegmina.

 

 

 

 

 

       
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Norm & Peg Dibble
       

On 08/12/2019, I was outside on our front sidewalk trimming flowers in pots and found this large bright green bug (with long antennae) on our sidewalk that looked like a grasshopper to me. It wasn’t alarmed by my closeness and the camera. I do not recall ever seeing one before. After looking on minnesotaseasons.com and other sites, I believe I found its ID. I’ve heard Katydids in our yard for years but never thought I was ever looking at one because I assumed they were up in the trees. That one eventually disappeared and I continued to trim flowers. I have a very large pot full of big, colorful Coleus plants, and discovered either the same Katydid or another one on a C deep inside the plant. It sure blended in so well with its leafy green textured wings! (Sorry about my purple silk flowers that its left foot is resting on!) What a really a fun sight for both Norm and I to see.

  oblong-winged katydid   oblong-winged katydid
       
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Other Videos
 
  Amblycorypha oblongifolia eats human being
Lykoloo
 
   
 
About

Published on Aug 8, 2017

Such a tragedy.

   
       
  Katydid Song-Oblong Winged Katydid
ONnaturegirl
 
   
 
About

Published on Aug 28, 2013

This is the song of the male Oblong-winged Katydid (Amblycorypha oblongifolia) (Family: Tettigoniidae). He makes the song through "stridulation": rubbing his wings together.

   
       
  Oblong-winged katydid moving at full speed.
Heather Hopkins
 
   
 
About

Published on Aug 1, 2013

This oblong-winged katydid (Amblycorypha oblongifolia) is hauling ass across the deck in order to get away from the camera. Seriously, this is it moving as fast as possible until it decided to jump.

   
       

 

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Norm & Peg Dibble
8/12/2019

Location: Maple Grove, MN

On 08/12/2019, I was outside on our front sidewalk trimming flowers in pots and found this large bright green bug (with long antennae) on our sidewalk that looked like a grasshopper to me. It wasn’t alarmed by my closeness and the camera. I do not recall ever seeing one before. After looking on minnesotaseasons.com and other sites, I believe I found its ID. I’ve heard Katydids in our yard for years but never thought I was ever looking at one because I assumed they were up in the trees. That one eventually disappeared and I continued to trim flowers. I have a very large pot full of big, colorful Coleus plants, and discovered either the same Katydid or another one on a C deep inside the plant. It sure blended in so well with its leafy green textured wings! (Sorry about my purple silk flowers that its left foot is resting on!) What a really a fun sight for both Norm and I to see.

oblong-winged katydid


     
     
 
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Created: 8/30/2019

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