Each year, Beijing hosts 200–300 species of migratory birds including the common crane, black-headed gull, swan, mallard, common cuckoo and the endangered yellow-breasted bunting.   In May 2016, Common cuckoos nesting in the wetlands of Cuihu (Haidian), Hanshiqiao (Shunyi), Yeyahu (Yanqing) were tagged and have been traced to far as India, Kenya and Mozambique.  In the fall of 2016, the Beijing Forest Police undertook a month-long campaign to crack down on illegal hunting and trapping of migratory birds for sale in local bird markets.  Over 1,000 rescued birds of protected species including streptopelia, Eurasian siskin, crested myna, coal tit and great tit were handed to the Beijing Wildlife Protection and Rescue Center for repatriation to the wild.