chalk-fronted corporal

chalk-fronted corporal

 

 

 

 

 

 

 

 

 

More photos…

Ladona julia


Status

Often abundant

Flight/Season

Late May to early August

Habitat

Lakes, ponds, marshes, peat bogs, slow streams.

Size

1 to 113 16 long


Identification

This is a medium-sized skimmer, 1 to 113 16 long.

Juveniles are light orangish-brown. There is a broad, dark stripe down the top of the abdomen and a pair of pale stripes on the top of the thorax. There is a small, triangular, brown patch at the base of the hindwing, where the wing attaches to the thorax. Aside from the basal patch and the stigma, the wing is clear. The face is brown and the forehead is gray.

As they mature, they develop a waxy bloom (pruinescence) at segments 2 through 4 or 5 of the abdomen. On males, the pruinescence is white and the abdomen turns black. On females, the pruinescence is gray and the abdomen turns dark brown. Males also develop two stripes of white pruinescence, “corporal stripes”, on the top of their thorax. Females have a shorter, blunt abdomen, about as long as the wing.

 
Similar
Species

Common whitetail (Libellula lydia) wings have a broad, dark band.

Frosted whiteface (Leucorrhinia frigida) is smaller and more slender.

Widow skimmer (Libellula luctuosa) wings are boldly patterned, not clear.


Naiad Food

Mosquito larvae, mayfly naiads, other aquatic fly larvae, and freshwater shrimp.

 
Adult Food

Mosquitoes, flies, butterflies, moths, mayflies, and flying ants or termites, and other soft-bodied flying insects.

 
Life Cycle

The female hovers just above the surface of shallow water, dips the tip of her abdomen into the water, and deposits the eggs. The male does not guard the female as she deposits her eggs.

The naiads live on the bottom in a layer of decaying vegetation. They emerge as adults at night.

Adults perch horizontally on the ground, on objects in water, or on other flat surfaces, and fly up to snatch prey.

 
Behavior

 


Range Range Map   Sources: 7, 16, 18.
 
Sightings

Clear Lake SNA

Crow Wing State Park

Lake Carlos State Park

Lake Maria State Park

Lebanon Hills Regional Park

Maplewood State Park

Mille Lacs Kathio State Park

Murphy-Hanrehan Park Reserve

Twin Lakes SNA


Comments

 


Images  
Male male chalk-fronted corporal   male chalk-fronted corporal   male chalk-fronted corporal   male chalk-fronted corporal
               
Female female chalk-fronted corporal   female chalk-fronted corporal   female chalk-fronted corporal    
               
Juvenile juvenile chalk-fronted corporal            

Taxonomy

Order:

Odonata (dragonflies and damselflies)

 

Suborder:

Epiprocta

 
 

Infraorder:

Anisoptera (dragonflies)

 

Superfamily:

Cavilabiata

 
 

Family:

Libellulidae (skimmers)

 
Synonyms

Libellula julia

 
Common
Names

chalk-fronted corporal


 

 

pruinescence

A waxy bloom that covers the underlying coloration and gives a dusty or frosty appearance.

 

stigma

In plants, the portion of the female part of the flower that is receptive to pollen. In Odonata and Hymenoptera, a blood-filled blister or dark spot at the leading edge of each wing toward the tip, thought to dampen wing vibrations and signal potential mates.

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