common tan wave

(Pleuroprucha insulsaria)

               
Hodges #

7132

common tan wave

 

Conservation Status

IUCN Red List

LC - Least Concern

NatureServe

NNR - Unranked

SNR - Unranked

Minnesota

not listed

Occurrence

Common in eastern U.S., less common in Minnesota

    Photo by Alfredo Colon
Flight/Season

Three generations. Early June to early September.

Habitat

Agricultural fields, field edges, deciduous woodlands, and forest openings.

Size

Total Length: ¼ (7.0 to 7.5 mm)

Wingspan: 916 to 1316 (14 to 21 mm)

 
 
Identification

Common tan wave is a small, short-lived, geometer moth. It occurs in North, Central, and South America. In the United States it occurs in the Great Plains and in every state east of the Great Plains. It is common in the eastern half of the United States, less common in the eastern half of Minnesota, where it nears the western limit of its range. It is found from early June to early September in agricultural fields, field edges, deciduous woodlands, and forest openings. It is a minor agricultural pest of corn but causes little damage.

Adults are ¼ (7.0 to 7.5 mm) long and slender. They have relative large wings, with a wingspan of 916 to 1316 (14 to 21 mm). The forewings and hindwings are similar: triangular, mottled, and pale yellowish-brown with a faint, almost imperceptible greenish tinge. The outer edges are slightly scalloped. There is a dark antemedial line (AM line) with three black dots; a dark postmedial line (PM line); and a thin, white, scalloped, submarginal line with a broader, dark, inner border and a dark reddish-brown dot on each vein. On some individuals all of the lines are distinct. On others the AM and subterminal lines may be barely discernible. There is no discal spot. The fringe is very long.

The antennae on the female are thread-like (filiform). The lower half of the antennae on the male are feather-like with branches on one side only (pectinate).

The mature larvae (caterpillar) is about (1.5 cm.) long and highly variable in appearance. It may be yellow, green, gray, or brown, and it has white and brown markings. The hardened plate (prothoracic shield) on the upper side of the first segment of the thorax (T1) often has a pale, thin stripe in the middle (middorsal stripe) and broader subdorsal stripes. When viewed from above T2 and T3 are noticeably swollen. On the thorax and abdomen there is a well-developed middorsal stripe and a white stripe through the row of breathing pores (spiracular stripe). On the first five abdominal segments there is often a large, dark chevron with a pale rear (posterior) margin on each side of the middorsal stripe. The are only two pairs of fleshy, leg-like structures (prolegs), one pair each on the sixth and last abdominal segments.

 
Similar
Species

 

 
Larval Food

Mostly fresh corn silk. When that is not available, also trees and low plants, including bittersweet, bedstraw, goldenrod, oak, willow, sumac, aster, joe pye weed, and other plants

 
Adult Food

Pupa overwinter. Adults are short-lived, lasting an average of just 6.4 days.

 
Life Cycle

 

 
Behavior

Caterpillars feed during the day and often hang from a short thread at night, possibly to escape predators.

Adults are active at night and will come to light. They spend the day on the underside of a leaf and will fly if disturbed. They rest with wings spread out and flattened to the leaf surface.

 
Distribution Distribution Map  

Sources: 21, 24, 29, 30, 71, 72, 75, 82.

 
Comments

 

 
Taxonomy

Order:

Lepidoptera (butterflies and moths)

 

Suborder:

Glossata

 

Infraorder:

Neolepidoptera

 

Parvorder:

Heteroneura

 

No Rank:

Ditrysia

 

No Rank:

Obtectomera

 

Superfamily:

Geometroidea (inchworm moths)

 

Family:

Geometridae (geometer moths)

 

Subfamily:

Sterrhinae (waves and mochas)

 

Tribe:

Cosymbiini

 

Genus:

Pleuroprucha

 
Synonyms

 

 
Common
Names

common tan wave

common tan wave moth

 

 

 

 

 

 

 

Glossary

Antemedial (AM) line

A thin line separating the basal area and the median area of the forewing of Lepidoptera.

 

Postmedial (PM) line

A thin line separating the median area and the postmedial area of the forewing of Lepidoptera.

 

Proleg

A fleshy structure on the abdomen of some insect larvae that functions as a leg, but lacks the five segments of a true insect leg.

 

Prothoracic shield

The hardened plate on the dorsal surface of the first segment of the thorax.

 

 

 

 

 

       
Visitor Photos
   
Share your photo of this moth.
 

This button not working for you?
Simply email us at info@MinnesotaSeasons.com.
Attach one or more photos and, if you like, a caption.

       
Alfredo Colon
       
  common tan wave    
       
MinnesotaSeasons.com Photos
   
       
       
       

 

Camera

     
Slideshows
   
  Pleuroprucha
Bill Keim
 
  Pleuroprucha  
 
About

Family: Geometridae
Subfamily: Sterrhinae
Tribe: Cosymbiini
Genus: Pleuroprucha

- Pleuroprucha insulsaria (Common Tan Wave)

 
     

 

slideshow

       
Visitor Videos
   
Share your video of this moth.
   

This button not working for you?
Simply email us at info@MinnesotaSeasons.com.
Attach one or more videos or YouTube links and, if you like, a caption.

       
       
       
Other Videos
 
       
       
       

 

Camcorder

         
Visitor Sightings
   
Report a sighting of this moth.
 
This button not working for you?
Simply email us at info@MinnesotaSeasons.com.
Be sure to include a location.

Alfredo Colon
9/3 to 9/5/2019

Location: Woodbury, Minnesota

common tan wave


 
MinnesotaSeasons.com Sightings
         

 

 

 

Binoculars


Created: 5/23/2020

Last Updated:

About Us | Privacy Policy | Contact Us | © 2020 MinnesotaSeasons.com. All rights reserved.