A Napa Valley entrepreneur and vintner pleaded guilty in federal court to charges he illegally trafficked in parts of endangered whales and sea turtles. Ma(i)sonry tasting-room proprietor and art curator Michael Polenske, who runs Blackbird Vineyards in Napa, entered guilty pleas in U.S. District Court in San Francisco Tuesday to conspiracy to traffic wildlife and wildlife trafficking, both misdemeanors, in violation of the Endangered Species Act. Polenske, 53, admitted that in November 2006, he sent an e-mail instructing Hedley’s Humpers, the London shipping company that he hired, “lets not use the word shell use ‘oval shaped’” and “w[e] should say ‘abstract’ wood sculpture instead of Whale Vertebrae,” court records show. Between 2006 and 2014, Hedley’s Humpers illegally shipped for Polenske 26 protected wildlife items to the U.S. under false labels, with a collective market value of about $81,000, authorities said. The investigation by the National Oceanic and Atmospheric Administration began in 2011, when an auction website showed that Ma(i)sonry, located in Yountville, was offering for sale 12 whale vertebrae, two Orca whale jawbones and a sea turtle shell, Nicholas Call, a special agent with the agency’s office of law enforcement wrote in a court affidavit. All whale parts are protected under the Marine Mammal Protection Act, and sea turtles are protected under the Endangered Species Act. “The shipment contained several undeclared, unpermitted wildlife articles — seven turtle carapaces (the upper part of the shell), five Tridacna (giant clam) half shells and two stuffed bird mounts,” Call wrote, referring to the earlier seizure.