Jase Wiarda occasionally calls a company with a pressure washer to give his rubber duck a bath. “It’s a weird phone call to make,” he said. “People think it’s a prank.” That is, until they realize ...

Nick Olsen first noticed the mother duck while he was setting up for an event one morning on the rooftop terrace of D.C.’s Planet Word museum two weeks ago. “I was like, ‘What’s going on?’” said Olsen ...