2-88032-605-2 .   ^ IUCN Conservation Monitoring Centre (1988). 1988 IUCN Red List of Threatened Animals . Gland, Switzerland and Cambridge, UK: IUCN.   ^ IUCN (1990). 1990 IUCN Red List of Threatened Animals . Gland, Switzerland and Cambridge, UK.: IUCN.   ^ Groombridge, B. (1994). 1994 IUCN Red List of