Scoliopteryx libatrix
(Linnaeus, 1758)
Herald
Sort #: 2249 | P #: 930601 | MPG #: 8555 | PFG Page #: 328
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Larval feeding type: Pupates between spun leaves
Larval substrate: Salix spp.* (Willow, especially narrow-leaved species), Salix occidentalis* (Dwarf Prairie Willow), Populus (Poplar)
Phenology: Adult: 10/10 to 5/29 and 6/17 to 9/20 (97 records)
Comment: This species overwinters as an adult in dark places, such as caves, barns, cellars, tree holes, etc; only one record of the species overwintering in Massachusetts exists (in a natural cave in Berkshire Co. in October - no further details made available). The species appears to have two overlapping generations, with larvae found in May/June (not yet found in MA) and August/September. June adults could be hangers-on from the overwintering population, or early Summer generation individuals. Some Summer generation individuals may hibernate. The precise situation in Massachusetts needs to be worked out. The apparent freshness of individuals is no indication of age.
Status in MA (automated assessment): Widespread, fairly common
Status in N. America: Holarctic
MA Endangered Species Act status: None
First Year Reported: 1833
Last Year Reported: 2025
Distribution by County: Berkshire, Hampden, Hampshire, Franklin, Worcester, Middlesex, Essex, Suffolk, Norfolk, Bristol, Plymouth, Barnstable, Dukes, Nantucket
Number of Records: 161
