The brand new edition of WAZA magazine is available free online. It has 11 articles on critically endangered species which I thought people might find interesting. There's the well known species (i.e. Scimitar-horned Oryx, Californian Condor, Black-footed Ferret etc.) but also some pretty unheard of species as well; the Wyoming Toad, the Yarqon Bleak (a fish) and especially the Socorro Isopod (a small crustacean).
http://www.waza.org/files/webconten...amme/extinct_in_the_wild/WAZA Magazine 13.pdf
http://www.waza.org/files/webconten...amme/extinct_in_the_wild/WAZA Magazine 13.pdf