Among the endangered species kept at the ACCB are the Giant Ibis (Pseudibis gigantea), White-shouldered ibis (P. davisoni) and Bengal Florican (Houbaropsis bengalensis), as well as the Lesser Adjutant (Leptoptilos javanicus, vulnerable, VU), the Asian Woollyneck (Ciconia episcopus, near threatened, NT), and the Green Peafowl (Pavo muticus, endangered, EN). The latter two are already being bred regularly and successfully at the ACCB, and the offspring are being reintroduced to protected areas. 

The ACCB also maintains several breeding pairs of the Greater Adjutant (Leptoptilos dubius, EN). This once very common bird has become increasingly rare due to habitat loss and is on the verge of extinction. It now breeds only in Assam, India, and Cambodia. 

For the first time, an Argala pair incubated eggs in 2023. However, the rearing of the young animals by the parents failed and hand-rearing was abandoned.