This video was taken in the early evening of 07/24/2012 at 8:45 CDT at a large strip center mall off a busy highway in the city of Stafford, Texas. The Purple Martin birds came from the surrounding area in Fort Bend County to roost for the night. Local ornithologist estimate there to be in excess of 10,000 birds. They gather and roosting started at about 8:00 PM and ended by around 8:45 PM. This occurred every night for about 2 weeks before they all gathered for a returning to South America. Martins are Neotropic in nature and migrate south each winter to South America (Brazil and surrounding areas) each year. They do not nest while in their wintering grounds. Instead, they use this time to put on a whole new coat of feathers. (All birds molt at least once every year to renew their feathers). About late Dec or early Jan, they begin returning to the very southern states to begin nesting.