The somatic chromosome number of the jungle myna, Acridotheres fuscus fuscus and the common myna, A. tristis tristis, both belonging to the family Sturnidae, is 74 and 80 respectively. The sex mechanism is of the ZZ/ZW type. The W-chromosome is the smallest macrochromosome and can easily be identified. The macro and microchromosomes have the same staining affinity and they are in no way different except in their size.