Standing on their spindly legs, a flock of pink lawn flamingos have taken over Seaport Common. More than 1,900 of them flocked to the Boston neighborhood this week as part of a migratory public art project that will be landing in various communities through mid-April. The flock debuted earlier this month at Derby Street Shops in Hingham and is now in the Seaport through March 30. They're also scheduled to later visit The Street Chestnut Hill and MarketStreet Lynfield from April 1-12.The public art project is the work of Massachusetts-based developer, WS Development.Despite a lack of real flamingos in the wild locally, the pink plastic lawn flamingo was actually created in Massachusetts. Don Featherstone designed the first for a local company in 1957.