On an island continent where nearly half of all bird species exist nowhere else on Earth, Australia has begun a quiet reckoning with a virus it cannot stop. Following the June arrival of H5N1 and the mass seabird deaths of late July, the government announced on August 11 a vaccination program targeting captive birds of the most endangered endemic species — not to halt the outbreak, but to hold the line against extinction. It is a plan built not on optimism, but on the ancient human instinct to preserve what is irreplaceable before the moment passes.