The FBI says it has seized a forgery of Andrew Wyeth’s painting “Snow Birds” from a New York auction house.

The fake painting, seized in July, had been for sale at the unidentified auction house, and was estimated to be worth between $300,000 and $500,000.

But before an auction took place, questions arose concerning its authenticity.

An expert at the Andrew Wyeth office at the Brandywine River Museum identified it as a forgery.

The person selling the artwork agreed to forfeit his interest in the painting.