By: Wynne Parry, LiveScience Senior Writer Published: 09/08/2012 08:37 AM EDT on LiveScience On Sunday night, tourists on the observation deck of the Empire State Building may get a view of an entirely different type of traveler, headed south for warmer climes, predicts a new project, called BirdCast, which is working to offer detailed predictions of bird migrations. A large number of the migrating birds are expected to fly over the city during Tuesday's lighting of the Sept.