OTTAWA—Snowbirds are rushing to get inoculated down south as provincial vaccine rollouts lag north of the border, with Canadian seniors enjoying readier access to doses in Florida than back home. While many of the roughly one million Canadians who flock to sunnier climes each winter have stayed put this year, those who made the migration are signing up for shots and avoiding the wait facing people from Newfoundland and Labrador to British Columbia. More than 329,000 people in Florida alone have already received at least one dose, compared to fewer than 206,000 doses administered across Canada as of Thursday, according to one vaccine tracker. Perry Cohen, a 74-year-old Torontonian who spends roughly half the year in the Sunshine State, says he was among the first to receive a shot at his retirement community in Deerfield Beach, north of Miami. “It’s a nice way to start the year off. I’ve got …