The invasive species was likely brought to Australia unintentionally by ship. Now found in every state and territory, the wasps are decimating our ecosystems.
Death is a natural part of ecosystems. But it's unusual for a large number of animals to all die at once. Researchers are investigating how a mass mortality event affects what's left afterwards.
Scavengers play an important but often poorly understood role in how fast bodies decompose.
Millions of dead carp will fill the Murray-Darling Basin after the government releases a targeted virus. Scavengers like turtles and crayfish might help – as long as we protect them.
They might keep the environment clean and healthy but most species are in steep decline.