You are watching a live broadcast of Purple Martins nesting. Located in Lake Tawakoni, TX, USA. 

This nest is in an artificial gourd hanging from an aluminum rack. Purple Martins are the largest North American Swallow. Along the eastern United States, Purple Martins rely almost entirely on artificial housing from humans to reproduce. Purple Martins migrate to the Amazon basin during the winter months. Purple martins suffered a major population crash in the 20th century widely linked to the release and spread of European Starlings in North America. Starlings and House Sparrows compete with martins for nest cavities. Where purple martins once gathered by the thousands, by the 1980s they had all but disappeared.