There's no western longbeaks anywhere near the Huon Peninsula, wrong side of New Guinea. So we might end up with eastern longbeak instead, an unrealistic choice for everything besides recreating Taronga Zoohope your specific or we might end up with the western long beaked echidna instead of the short beaked

Short-beaked echidnas actually inhabit some of the lowland forests just to the south and west of the Huon Peninsula, so they get close!