The discovery of the water-willow stem borer moth at Mill Pond in West Tisbury could have a big impact on brook conservation.

Dr. Paul Goldstein is an expert on moths and butterflies. He began his formal study of Vineyard lepidoptera at Felix Neck in 1986.

The Io moth also stood out from the others because of its size and coloration.

Concerned down-Island homeowners and some experts are reporting an unusual and troubling abundance of the ravenous creatures. If confirmed the Island’s trees face a cruel spring, but it appears that the damage, though severe, may be localized.