Lawn Moth or Sod Webworm Moth
Scientific Name: Fanniidae species (often Crambus sp. or Tehama bonifatella)
Order & Family: Lepidoptera: Crambidae
Size: Wingspan of 15-20 mm; body length typically around 10-15 mm.
Natural Habitat
Grassy areas, lawns, meadows, and adjacent structures like house walls and fences.
Diet & Feeding
Larvae (caterpillars) feed on various grasses including bluegrass and fescue; adults primarily feed on flower nectar or do not feed at all.
Behavior Patterns
Primarily nocturnal or crepuscular; they are often seen Resting on vertical surfaces during the day. Their flight pattern is zigzagging and low to the ground. They are highly attracted to artificial lights.
Risks & Benefits
No risk to humans or pets; however, large populations of larvae (sod webworms) can cause brown patches and damage to ornamental lawns. They serve as a food source for birds and spiders.
Identified on: 4/10/2026