 This species was seldom seen in captivity before the late 1950s , after which time a large number of wild @-@ caught birds entered the Australian market . Since then , it has become more common , but is still rarely seen outside Australia . Captive yellow @-@ tailed black cockatoos require a large aviary to avoid apathy and poor health . There is some evidence that protein may be more important to them than to other cockatoos , and low protein has been linked with the production of <unk> eggs in captivity . Females in particular enjoy mealworms . They can be placid and tolerate sharing an enclosure with smaller parrots , but do not handle disturbance while breeding . As with other black cockatoos , yellow @-@ tailed black cockatoos are rarely seen in European zoos , since Australia restricted exportation of wildlife in 1959 , but birds seized by government agencies in Germany , the Netherlands and the United Kingdom have been loaned to zoos that are members of the European Association of Zoos and Aquaria ( EAZA ) . In 2000 , there were pairs of yellow @-@ tailed black cockatoos in Puerto de la Cruz zoo in Spain and in Rotterdam . Like most species of parrots , the yellow @-@ tailed black cockatoo is protected by the Convention on International Trade in Endangered Species of Wild Fauna and Flora ( CITES ) with its placement on the Appendix II list of vulnerable species , which makes the import , export , and trade of listed wild @-@ caught animals illegal . 
