The Greens candidate for the federal seat of Perth has made a pitch to traditional Liberal voters who will be left without a candidate in the upcoming byelection.

Caroline Perks, an expert in climate change policy, said she would be reaching out to disenfranchised Liberal supporters after their party decided to not contest the vote.

Greens Perth candidate Caroline Perks is reaching out to disenfranchised Liberal voters in the hope her party can upset Labor at the upcoming byelection. Credit:Nathan Hondros

The Liberal party vacated the contest after deciding they could not win the safe Labor seat in a byelection caused by the resignation of sitting Labor MP Tim Hammond.

A federal government has not won a seat off an opposition party in a byelection for almost a century.