Victorian Greens leader Greg Barber says the Western Australia election should be a warning to Victorian Liberals considering a preference deal with Pauline Hanson's One Nation.

Protected freckled ducks, blue-billed ducks and blue-winged shovelers have been recorded at wetlands across Victoria, but only one week from opening weekend the government has failed to close wetlands.

The Greens will today challenge all parties in the Victorian Parliament to preference Pauline Hanson’s One Nation last at the next state election, on account of her vilification and discrimination against the Muslim community.