Over 5,000 artificial nests are being installed for the endangered house sparrows and several other bird species in Odisha's Ganjam district to create a habitat for their breeding, forest department officials said. The state water resources department, which is constructing an irrigation project at Ghatekeswar in the district, has provided Rs 5 lakh to the forest department for installation of artificial nests near the dam site, they said. "As population of house sparrows has declined alarmingly.