Synchronised bird census begins Updated: Updated: February 17, 2021 16:19 IST The enumerators were briefed about the methodology of counting birds, including migratory birds, at an induction programme before the census. Share Article AAA A. Kumaraguru, Conservation Scientist, Biodiversity Conservation Foundation, briefing the volunteers about the bird census at the Bird Sanctuary at Udhayamarthandapuram in Tiruvarur district, Tamil Nadu on February 17, 2021. | Photo Credit: S. Ganesan The enumerators were briefed about the methodology of counting birds, including migratory birds, at an induction programme before the census. A two-day synchronised bird census began in all bird and wildlife sanctuaries in the central region on February 17.