SAN FRANCISCO -- The Port of San Francisco is under federal investigation after workers apparently destroyed a rare birds' nest on a crane near Pier 80.
KPIX-TV reports (http://cbsloc.al/10zyXZD ) federal fish and wildlife authorities are trying to determine whether the workers violated the Migratory Bird Treaty Act, a federal law that makes it illegal to destroy an "active" raptor's nest during mating season.
The nest was the Bay Area home of a pair of rare ospreys, which were once near extinction.
Last year, the port agreed to shut down the crane to allow the ospreys to nest. After about six months, port workers put reflectors and wires on the crane and took other steps to keep the birds from returning.
Potrero Hill naturalist Eddie Bartley says he spotted workers destroying the nest last week.
Information from: KPIX-TV.