Metria amella
Guenée, 1852
Live Oak Metria Moth
Metria amella, commonly known as the Live Oak Metria , is a of in the Erebidae. It is to North America and is associated with live oak . The species was described by Achille Guenée in 1852, originally placed in the Campometra. It is the sole species in the genus Metria, making it taxonomically distinctive among Erebidae.
Pronunciation
How to pronounce Metria amella: /ˈmɛ.tri.a æˈmɛl.la/
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Identification
The combination of pale tan with fine wavy and nearly distinguishes Metria amella from similar Erebidae . It lacks the bold spotting or strong contrasting patterns seen in many related . The Metria is , so any moth matching this description and occurring in association with live oaks in the southeastern United States can be confidently identified as this . Dissection of is not required for field identification given its unique appearance and restricted range.
Images
Appearance
-sized with wingspan approximately 25–35 mm. are pale tan to buff-colored with fine, wavy transverse and a small dark discal spot. are lighter, nearly or pale gray, with faint marginal markings. Body is slender and uniformly colored, matching the forewings. are (thread-like) in both sexes.
Habitat
Associated with live oak (Quercus virginiana) woodlands and maritime forests. Found in coastal plain environments from Texas to North Carolina, including oak hammocks, scrub oak , and urban parks with mature live oaks. Larval is specifically the and leaf litter of live oak trees.
Distribution
to the southeastern United States. Range extends along the Atlantic and Gulf coastal plains from North Carolina south through Florida and west to Texas. Distribution closely follows that of its , Quercus virginiana.
Seasonality
are active from late winter through early summer, with peak activity in March and April in most of the range. In southern Florida, activity may begin in February. Single-brooded () throughout most of range; partial second possible in southern Florida.
Diet
feed exclusively on leaves of live oak (Quercus virginiana). do not feed.
Host Associations
- Quercus virginiana - larval Exclusive ; feed on leaves
Life Cycle
are laid on live oak leaves. feed on foliage, completing development in approximately 4–6 weeks. occurs in leaf litter or loose soil beneath trees. emerge the following season; overwinters as .
Behavior
are and attracted to light. are solitary feeders on live oak foliage, resting on leaf undersides during daylight. No known defensive behaviors; larvae drop from leaves on threads when disturbed.
Ecological Role
Primary consumer of live oak foliage. Serves as for birds, , and . Contribution to through leaf consumption and deposition is minor given low relative to .
Human Relevance
Occasional minor pest in urban live oak plantings when are high; is rarely significant. Serves as an for intact live oak . No economic importance.
Similar Taxa
- Iridopsis spp.Pale geometrid with similar resting posture, but have more angular margins and different patterns including more pronounced or spots
- Renia spp.Related Erebidae with pale coloration, but Renia have more rounded and typically show stronger dark discal spots or markings
- Zanclognatha spp.Similar size and pale color, but have more triangular with distinct dark or , and different antennal structure in males
More Details
Taxonomic Note
Metria is a established for this , which was originally described in Campometra. Its placement within Erebinae reflects phylogenetic studies of the 'bombycoid' grade within .
Conservation Status
Not evaluated by IUCN. Secure throughout range due to widespread distribution of , though localized declines possible with live oak loss.