Pachysphinx modesta
(Harris, 1839)
Big Poplar Sphinx
Sort #: 1750 | P #: 890148 | MPG #: 7828 | PFG Page #: 264
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Larval feeding type: Feeds externally
Larval substrate: Populus (Poplar, Aspen), Salix (Willow)
Phenology: Adult: 5/22 to 8/05 (122 records)
Status in MA (automated assessment): Restricted distribution, fairly common
Status in N. America: Native
MA Endangered Species Act status: None
First Year Reported: 1874
Last Year Reported: 2025
Distribution by County: Berkshire, Hampden, Hampshire, Franklin, Worcester, Middlesex, Essex, Suffolk, Norfolk, Nantucket
Number of Records: 149
