CANBERRA, Australia (AP) — As a self-described straight crocodile hunter from the country's rugged and socially conservative far north, Australian lawmaker Warren Entsch doesn't fit many people's mold of a gay-rights activist. But if results of a nationwide postal survey this week reveal that most Australians want same-sex marriage legalized, it is Entsch — from the country's leading conservative party, no less — who plans to introduce legislation that could make it a reality as soon as December. Entsch, 67, emerged as an unlikely champion for gay rights back in 2004, when he complained that the government had amended federal laws to make clear that marriage exists only between a man and a woman.