spotted grass moth

(Rivula propinqualis)

               
Hodges #

8404

spotted grass moth

 

Conservation Status

IUCN Red List

not listed

NatureServe

NNR - Unranked

Minnesota

not listed

Occurrence

Common

Flight/Season

May to August

Habitat

Meadows, moist grassy areas, woodland edges

Size

Total Length: to 7 16 (10 to 11 mm)

Wingspan: to ¾ (15 to 19 mm)

         
         
          Photo by Alfredo Colon
 
Identification

Spotted grass moth is an easily recognized, very small owlet moth. It occurs in the United States east of the Great Plains and in the Northwest, and across southern Canada. It is common in Minnesota. Adults are to 7 16 (10 to 11 mm) in length and have a wingspan of to ¾ (15 to 19 mm).

The forewings are pale yellow or straw-colored. There are scattered dark scales over the entire wing surface and there is usually at least some brown shading at the rear margin. A dark brown, often large patch surrounds a small purple kidney-shaped (reniform) spot and extends to the outer (costal) margin. Three narrow, parallel, brown or pale brown lines cross the wings: a W-shaped line separating the basal and median areas (antemedial line); a line separating the median and subterminal areas (postmedial line) that curves sharply, almost forming a loop near the costal margin; and a line on the rear margin at the base of the fringe (terminal line). The hindwing is slightly lighter. It has a terminal line and just a trace of a postmedial line.

The antennae are slender and thread-like.

 
Similar
Species

 

 
Larval Food

Grasses

 
Adult Food

 

 
Life Cycle

 

 
Behavior

Adults are active at night (nocturnal) and will come to light. The wings are held flat when at rest.

 
Distribution Distribution Map  

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

 
Comments

 

 
Taxonomy

Order:

Lepidoptera (butterflies and moths)

 

Suborder:

Glossata

 

Infraorder:

Neolepidoptera

 

Parvorder:

Heteroneura

 

No Rank:

Ditrysia

 

No Rank:

Obtectomera

 

Superfamily:

Noctuoidea (noctuid moths)

 

Family:

Erebidae

 

Subfamily:

Rivulinae

 
Synonyms

 

 
Common
Names

spotted grass moth

yellow snout-moth

 

 

 

 

 

 

 

Glossary

Costal margin

The leading edge of the forewing of insects.

 

Reniform spot

A kidney-shaped spot or outline in the outer median area near the costal margin on the forewing of many moths of the Noctuidae family.

 

 

 

 

 

       
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Alfredo Colon
       
  spotted grass moth    
       
MinnesotaSeasons.com Photos
   
       
       
       

 

Camera

     
Slideshows
   
  Spotted Grass Moth (Rivula propinqualis)
Bill Keim
 
  Spotted Grass Moth (Rivula propinqualis)  
     
  Spotted Grass Moth - Hodges#8404 (Rivula propinqualis)
Andree Reno Sanborn
 
  Spotted Grass Moth - Hodges#8404 (Rivula propinqualis)  

 

slideshow

       
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Camcorder

         
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Alfredo Colon
8/31/2019

Location: Woodbury, Minnesota

spotted grass moth


     
     
 
MinnesotaSeasons.com Sightings
         

 

 

 

Binoculars

Created: 9/14/2019

Last Updated:

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