Insect trap

An electrocution-type insect trap for non-destructive capture of mosquitoes, in which an electric field for mosquito electrocution is optimisable through the provision of a variable voltage power supply. The insect trap can be portable and can be battery-powered, to enable use in remote locations. The variable voltage power supply can be arranged to controllably multiple an input DC voltage to an output DC voltage that is supplied to an electrocution grid. The electrocution grid may surround all or part of a cavity for receiving a lure (e.g. a living subject) to attract mosquitoes. The electrocution grid may comprise a plurality of parallel spaced-apart conductive elements that are electrically connected to the variable voltage power supply so that the output DC voltage creates an electric field between adjacent conductive elements.