Paranthrene tabaniformis

(Rottemburg, 1775)

dusky clearwing, dusky clearwing moth, poplar clearwing moth

Paranthrene tabaniformis, the dusky , is a sesiid to the Palearctic and Nearctic realms. The exhibits of , with transparent and wasp-like coloration. are active from May to August, with activity varying by location. The are wood-borers that develop through 6-7 , feeding internally on poplar, willow, and sea-buckthorn before pupating in chambers within larval galleries.

Pronunciation

How to pronounce Paranthrene tabaniformis: /pəˈrænθrɛniː tæˌbænɪˈfɔːrmɪs/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

The dusky clearwing can be distinguished from other Paranthrene by its association with Populus and the specific pattern of abdominal rings. It resembles in general appearance, but lacks the constricted waist and has two pairs of (the hind pair reduced and transparent). It differs from P. diaphana, which feeds primarily on Salix and has distribution in southeastern Europe, and from P. insolitus. The transparent wing patches with dark are characteristic of the . can be monitored using lures.

Appearance

have a wingspan of approximately 30 mm and length of approximately 14 mm. The bears a vertical bar before each and a ring. The displays yellow rings on 2, 4, 6, and sometimes 7. Middle and posterior are orange with black . Forewings are dark fuscous with an elongate obscure toward the base and a violet-blackish streak. are hyaline with dark fuscous and . occurs in : female antennae are with more , while male antennae are .

Habitat

Associated with stands of poplar (Populus spp.), willow (Salix), and sea-buckthorn (Hippophae). In young plantations, males at heights up to 3.0 m, roaming along tree tops and vegetation. In mature stands with trees approximately 15 m tall, activity extends to greater heights. Larval galleries occur in one-year-old poplar seedlings, beneath bark of stems and branches in older trees, and in shoots of plants.

Distribution

Palearctic and Nearctic realms. Recorded across Europe including Bulgaria, Romania, Belgium, and the Netherlands. Present in North America. Within Bulgaria, documented at 11 localities with established in poplar stands.

Seasonality

from May to August depending on location. In Bulgaria, adult occurs approximately one month after emergence in April. activity peaks vary regionally.

Diet

feed on poplar (Populus spp.), willow (Salix spp.), and sea-buckthorn (Hippophae rhamnoides). feeding habits are not explicitly documented in available sources.

Host Associations

Populus - larval primary ; bore in shoots, stems, and branches
Salix - larval recorded
Hippophae rhamnoides - larval sea-buckthorn; recorded
Apanteles evonymellae - solitary of early-stage ; causes 2.4-35.4% mortality (average 17.3% in Bulgaria)
Eriborus terebrans - solitary internal larval ; causes up to 39% mortality in summer , average 4.7% in
Bracon intercessor - gregarious external larval ; causes 1.5% mortality in , 3.2-5.8% in summer

Life Cycle

develop through 6-7 . Mature larvae pupate in chambers constructed within larval galleries. occur in the center of one-year-old poplar seedlings or beneath bark of stems and branches in older trees. occurs as larvae. In Bulgaria, in spring follows approximately one month after emergence. The is or partially depending on region.

Behavior

are effective fliers. Males use for mate location and exhibit patterns concentrated at lower heights (up to 3.0 m) in young plantations, with 90% of males flying at these levels. In mature stands, flight activity increases with height. Adults are and exhibit -mimicking appearance, possibly as . Parasitized construct conical '' structures of and over gallery openings before death, which may protect from hyperparasites and .

Ecological Role

function as wood-boring in poplar and willow stands, contributing to through gallery formation in dead and living wood. The serves as for multiple (Apanteles evonymellae, Eriborus terebrans, Bracon intercessor), supporting parasitoid in forest . wasp- may influence - dynamics.

Human Relevance

Considered a pest of poplar plantations and urban poplars, with damaging shoots, stems, and branches. have been tested for 'lure and kill' and mass trapping management, though studies showed reduced male capture without statistically significant decreases in rates compared to untreated plots. The is subject to research through and .

Similar Taxa

Paranthrene diaphanaMorphologically similar , but distinguished by primary association with Salix (willow) rather than Populus, and distribution in southeastern Europe versus widespread range of P. tabaniformis
Paranthrene insolitusThird European Paranthrene ; distribution and preferences differ from P. tabaniformis
Sesiidae (family members)Other share transparent areas and -; distinguished by specific abdominal ring patterns, associations, and responses

More Details

Sexual dimorphism in sensory structures

Female are with greater numbers of ; male antennae are . Seven of antennal and three types of sensilla have been identified through scanning electron microscopy, with differences in number, distribution, length, and width between sexes.

Subspecies

Three recognized: P. t. tabaniformis, P. t. kungessana (Alpheraky, 1882), and P. t. synagriformis (Rambur, 1866)

Flight behavior research

Sex studies revealed that trap height significantly influences male capture rates in mature stands, with most males in young plantations flying below 3.0 m and roaming along vegetation tops.