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Species Page - Archanara subflava
Archanara subflava ->species page

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scientific name    Archanara subflava    

common name     Subflava Sedge Borer

It occurs locally throughout most of Alberta, in all natural regions. It is found is and near marshes and other wetlands.

A medium-size moth (3.5-4.0 cm wingspan) with pale yellow brown to deep rust brown forewings with a darker shade along the cubital vein and a prominent row of dark dots marking the postmedian line where it crosses the veins, and a dark shade in the middle of the outer margin. The hind wings are tan to almost white, much paler than the forewings. Similar to Archanara oblonga, but subflava is generally much lighter in color, has much paler hindwings and lacks the row of terminal dots on the forewings. The illustrated specimen on the right is from the Moths of Canada website; the dark specimen is from Grant Co., WA.

life history
Adults are nocturnal and come to light. There is a single brood each year. The larvae are borers in cattails, rushes and bulrushes (Typha, Scirpus). The life history is very similar to that described for A. oblonga.

Nova Scotia west to BC, south to New Jersey in the east and Utah and California in the west.

The Subflava Sedge Borer may be found far from its wetland habitat and hostplants. The reedy ponds and marshes where this moth breeds are scattered across the landscape like islands in a sea. Many of these are intermittent, appearing and disappearing with changes in moisture regimes, and it is not surprising that subflava disperses to colonize new sites, as do other aquatic insects such as Dytiscus water beetles.

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References (3)
Specimen Info
There are 76 specimens of this species in the online database
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Specimen List (76)


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