Though the egret nesting season is not officially over, it’s over at Picher Canyon, where not a single nest was built, according to the head of conservation science at Audubon Canyon Ranch, the nonprofit that manages the 1,000-acre site near Stinson Beach.
Typically birds begin to arrive in April, court and begin building nests, said John Kelly; though a few birds visited the canyon this year, none courted, meaning the area was abandoned for the…