As new hardcover with dust jacket. Section 1: Invertebrates. 21 articles regarding the inclusion of invertebrates in zoo exhibits. Section 2: New Developments in the Zoo World. 13 articlesranginf from information on the 1989 corcodile survey,the breeding and rearing of the Salvadori's fig parrot, Amazilla humming bird and the use of food dispensers for the Walrus.