 The zoo has also, in the past, attracted a lot of criticism for keeping single and unpaired specimens of rare species like the banteng, great Indian one-horned rhinoceros, crowned crane and the lion-tailed macaque.Lack of breeding and exchange programs has led to the elimination of individuals and populations of environmentally vulnerable species like the southern cassowary, wild yak, giant eland, slow loris and echidna.The previously cramped, unsuitable and unhygienic conditions inside the cages, and in the zoo in general had been criticized for long.