Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

Walnut Spanworm Moth
Phigalia plumogeraria (Hulst, 1888)


Family: Geometridae
Subfamily: Ennominae
Identification:
Wing Span: 3.2-4.5 cm
Life History:
Flight: January to April
Caterpillar Hosts: Antelope Bitterbrush (Purshia tridentata), walnut, and willow
Adult Food:
Habitat:
Range: British Columbia to California, east to Utah and Wyoming
Conservation:
NCGR:
Management Needs:
Comments:
Taxonomy Notes: None.