birch catkin bug

(Kleidocerys resedae)

Conservation Status
birch catkin bug
Photo by Alfredo Colon
  IUCN Red List

not listed

     
  NatureServe

NNR - Unranked

     
  Minnesota

not listed

     
           
           
           
 
Description
 
 

Birch catkin bug is a small seed bug. It occurs in Europe, eastern Asia, and North America. Based on the number of reported sightings, it is relatively uncommon in Minnesota. However, it is probably under-reported due to its small size.

Adults are to 316 (4.5 to 5.5 mm) long, reddish-brown, and fairly hard-bodied.

The head is longer than wide, projected forward, and densely covered with small punctures (punctate). The beak-like part of the head containing the mouth parts (rostrum) has four segments. It is short, slender, and projects downward and forward when sucking plant juices. It is tucked into a groove on the underside of the thorax when not in use. The antennae are much longer than the head but much shorter than the body. They have four segments beyond the short basal segment (scape). They are widened at the tip (clubbed). The first and fourth segments are darker than the second and third. There are two large compound eyes on the sides of the head and two small simple eyes (ocelli) on the top of the head.

The exoskeletal plate covering the thorax (pronotum) is densely punctate.

There are two pairs of wings, and they are held flat over the body when at rest. The front wings (hemelytra) are longer than the hind wings and much longer than the body. The exoskeletal plate between the wing bases (scutellum), is large, triangular and reddish-brown at the tip. The hemelytra have a thickened part at the base and a thin, membranous, mostly transparent part at the tip, with a clear dividing line between the two. The thickened part is comprised of narrow area (clavus) behind the scutellum when the wings are closed and the broad marginal area (corium). At the end of the corium there is a small but distinct triangular area (cuneus). The clavus has three rows of punctures. The corium is clear or yellowish and has several dark spots.

The legs are mostly reddish-brown. The last part of the leg (tarsus), corresponding to the foot, is brownish-black and has 3 segments. The last tarsal segment has a claw at the tip. There is a pad at the base of each claw.

Nymphs look like wingless adults.

 
     
 

Size

 
 

Total Length: to 316 (4.5 to 5.5 mm)

 
     
 

Similar Species

 
     
     
 
Habitat
 
 

 

 
     
 
Biology
 
 

Season

 
 

One generation per year (in Ontario)

 
     
 

Behavior

 
 

 

 
     
 

Life Cycle

 
 

Adults overwinter within birch catkins in leaf litter on the ground. They emerge in early spring and lay eggs in June.

 
     
 

Nymph Food

 
 

Seeds of birch trees and shrubs

 
     
 

Adult Food

 
 

 

 
     
 
Distribution
 
 

Distribution Map

 

Sources

24, 27, 29, 30, 82.

 
  2/17/2020      
         
 

Occurrence

 
 

 

 
         
 
Taxonomy
 
 

Order

Hemiptera (true bugs, cicadas, hoppers, aphids and allies)  
 

Suborder

Heteroptera (true bugs)  
 

Infraorder

Pentatomomorpha (pentatomomorph bugs)  
 

Superfamily

Lygaeoidea (seed bugs and allies)  
 

Family

Lygaeidae (seed bugs)  
 

Subfamily

Ischnorhynchinae  
 

Genus

Kleidocerys  
       
 

Subordinate Taxa

 
 

birch catkin bug (Kleidocerys resedae fuscomaculatus)

birch catkin bug (Kleidocerys resedae geminatus) ?

birch catkin bug (Kleidocerys resedae resedae) ?

 
       
 

Synonyms

 
 

Lygaeus resedae

 
       
 

Common Names

 
 

birch catkin bug

 
       

 

 

 

 

 

Glossary

Corium

The thickened basal portion of the front wing that lies between the clavus and the membrane of insects in the family Hemiptera.

 

Cuneus

The triangular, hardened, horn-like tip of the forewing of a plant bug (family Miridae).

 

Hemelytron

The forewing of true bugs (Order Hemiptera), thickened at the base and membranous at the tip. Plural: hemelytra.

 

Ocellus

Simple eye; an eye with a single lens. Plural: ocelli.

 

Pronotum

The saddle-shaped, exoskeletal plate on the upper side of the first segment of the thorax of an insect.

 

Punctate

Dotted with pits (punctures), translucent sunken glands, or colored spots of pigment.

 

Rostrum

The stiff, beak-like projection of the carapace or prolongation of the head of an insect, crustacean, or cetacean.

 

Scutellum

The exoskeletal plate covering the rearward (posterior) part of the middle segment of the thorax in some insects. In Coleoptera, Hemiptera, and Homoptera, the dorsal, often triangular plate behind the pronotum and between the bases of the front wings. In Diptera, the exoskeletal plate between the abdomen and the thorax.

 

Tarsus

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

 

 

 

 

 

 
 
Visitor Photos
 
           
 

Share your photo of this insect.

 
  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

 
    birch catkin bug   birch catkin bug  
           
 
MinnesotaSeasons.com Photos
 
 

 

 
           
           

 

Camera

     
 
Slideshows
 
 
     
     
     

 

slideshow

       
 
Visitor Videos
 
       
 

Share your video of this insect.

 
  This button not working for you?
Simply email us at info@MinnesotaSeasons.com.
Attach a video, a YouTube link, or a cloud storage link.
 
 

 

 
     
     
       
       
       
 
Other Videos
 
  Kleidocerys resedae - Birch Catkin Bug
Maria Hellström
 
   
 
About

Jun 1, 2016

 
       

 

Camcorder

 
 
Visitor Sightings
 
           
 

Report a sighting of this insect.

 
  This button not working for you?
Simply email us at info@MinnesotaSeasons.com.
Be sure to include a location.
 
  Alfredo Colon
8/19/2019

Location: Woodbury, Minnesota

birch catkin bug  
           
 
MinnesotaSeasons.com Sightings
 
 

 

 

 

 

Binoculars


Created: 2/17/2020

Last Updated:

About Us | Privacy Policy | Contact Us | © 2021 MinnesotaSeasons.com. All rights reserved.