We present population size estimates of mollymawk species at Bollons Island in the Antipodes group based on counts in 1994 and 1995. Totals of 115 pairs of Black-browed Mollymawks Diomedea m. melanophrys and about 20 pairs of White-capped Mollymawks D. cauta steadi were estimated to be nesting. Based on previous counts from Bollons Island and population estimates from other islands in the New Zealand region, we conclude that numbers of D. m. melanophrys have increased in this region, in contrast to D. m. impavida which has decreased. The few data on the population size of D. cauta steadi hint at a population increase in that taxon also.