KATHMANDU, Feb 9: Easy availability of animal carcasses has helped conserve endangered vultures in Tanahun district. Availability of carcasses of cow and ox at Shishuwa Bhateri in Byas Municipality-10 has contributed to the conservation of the scavengers, also known as nature's cleanup crew. As a result, many vultures, which are at the risk of disappearing due to rampant urbanization, and lack of prey, have started making their presence in the area.