KENDRAPARA: As many as 70,000 birds of various species were spotted in the Bagagahan heronry during the four-day bird census in the Bhitarkanika National Park recently. Park DFO Prasan Kumar Behera said high-tech Global Positioning System (GPS) was used for counting and sampling the avian species. The census was carried out by a team of 15 forest officials and environmentalists. Bagagahan extends over four acres surrounded by Bhitarkanika river on the east, Suajhore creek on the north and Patijhore creek on the south.