Changing patterns in the distribution of the Mayaro virus vector Haemagogus species in Trinidad, West Indies

•Haemagogus mosquito species which had restricted distribution in Trinidad up to 1995 are now found to be widespread on the island.•Haemagogus janthinomys was the dominant species and was recorded in high abundances in several forest types.•Improved transportation networks, changing land use and immigration may have contributed to the new distribution patterns.•The breeding of these mosquitoes in communities within or close to forests is a cause for concern in the event of future epidemics.