KRISHNAGAR, Feb. 12: At a time when the critically endangered White-rumped Vulture Gyps, who were once a common sight in West Bengal, have indeed made a self-styled effort to be re-colonised in the Banguria forest near Bethuadahari Wildlife Sanctuary (BWS) in Nadia, hectic preparations are on to catch the spotted deer inside the sanctuary for its census after a long gap of seven years.