Hemileuca nevadensis

Stretch, 1872

Nevada Buck Moth

Hemileuca nevadensis, the Nevada buck , is a moth found in western North America. Females are larger than males, which have distinctive black with red tips. emerge in autumn and do not feed; consume willow and poplar. Males of this have been shown to exhibit no attraction to the lures of Argiope aurantia , suggesting potential evolutionary countermeasures against this tactic. Recent taxonomic revision has clarified that Great Plains formerly attributed to this species represent distinct .

Hemileuca nevadensis by (c) Grand Canyon National Park, some rights reserved (CC BY). Used under a CC-BY license.

Hemileuca nevadensis by (c) Don Henise, some rights reserved (CC BY). Used under a CC-BY license.

Pronunciation

How to pronounce Hemileuca nevadensis: /ˌhɛmɪˈluːkə nɪˈvɑːdənˌsɪs/

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

Identification

Distinguished from other Hemileuca by combination of creamy ground color with black-edged and ; male abdominal coloration (black with red tip) is diagnostic within the . Recent taxonomic work indicates that from the Great Plains and Great Lakes regions previously identified as H. nevadensis represent distinct species (H. latifascia and H. menyanthevora respectively), restricting true H. nevadensis to western populations.

Images

Appearance

creamy on upperside with black edges; each wing bears black . Males have black with red ; females larger overall with less contrasting abdominal coloration.

Habitat

Ridge tops, hilltops, and elevated roads with low vegetation and ample sun exposure; grassland and shrub-dominated in western North America

Distribution

Western North America from the Pacific coast east to Wisconsin and Michigan; Canadian provinces of Alberta, Manitoba, and Saskatchewan. Nominate H. nevadensis occurs in western portion of range; Great Plains and Great Lakes now assigned to other .

Seasonality

active September to December; with one annually

Diet

lack functional mouthparts and do not feed. feed on Salix (willow) and Populus (poplar).

Host Associations

Salix - larval
Populus - larval

Life Cycle

laid in rings around twigs of . spin loose in plant litter near host plant base to pupate. One per year.

Behavior

activity. Males well above vegetation in large circular patterns, reducing search diameter when detecting female plumes. Males exhibit no attraction to Argiope aurantia lures in experimental assays, unlike some .

Ecological Role

in documented -prey coevolutionary system with Argiope ; male behavioral to spider chemical lures contributes to understanding of predator-prey arms race dynamics.

Similar Taxa

Hemileuca latifasciaFormerly misidentified as H. nevadensis; Great Plains now recognized as distinct based on genetic divergence and geographic disjunction
Hemileuca menyanthevoraFormerly misidentified as H. nevadensis; eastern Great Lakes bog buckmoth elevated to status based on genetic and compatibility data
Hemileuca maiaClosely related in same phylogenetic clade; shares similar male behavioral response (no attraction to Argiope lures) and habits

Misconceptions

The taxonomic circumscription of H. nevadensis has been historically misinterpreted, with Great Plains and Great Lakes incorrectly assigned to this . These populations are now recognized as distinct species based on integrated genetic, geographic, and reproductive data.

More Details

Taxonomic Revision

A 2022 study established that true H. nevadensis is restricted to western ; Great Plains and Great Lakes populations represent cryptic now described as H. latifascia and H. menyanthevora respectively.

Predator-Prey Coevolution

Experimental studies demonstrate that male H. nevadensis do not respond to Argiope aurantia lures, unlike some . This pattern, shared with H. maia and H. grotei in the same clade, suggests evolved countermeasures against a tactic where spiders mimic female .