Catocala ultronia

(Hübner, 1823)
Ultronia Underwing

Sort #: 2326 | P #: 930841 | MPG #: 8857 | PFG Page #: 348
View on BugGuide | View on iNaturalist | BOLD Link

Larval feeding type: Feeds externally on leaves
Larval substrate: Primarily Prunus spp. (Cherry, Plum), Prunus serotina* (Black Cherry), also Malus (Apple), Crataegus (Hawthorn)
Phenology: Adult: 7/01 to 10/19 (621 records)

Status in MA (automated assessment): Widespread, very common
Status in N. America: Native
MA Endangered Species Act status: None
First Year Reported: 1911
Last Year Reported: 2025

Distribution by County: Berkshire, Hampden, Hampshire, Franklin, Worcester, Middlesex, Essex, Suffolk, Norfolk, Bristol, Plymouth, Barnstable, Dukes, Nantucket
Number of Records: 883