Red kangaroos have died from massive hemorrhaging and internal bleeding (stock image)
A mysterious illness has been killing millions of kangaroos which has left experts scratching their heads.
In NSW, wildlife researchers have found the red and grey varieties of kangaroos have died as a result of massive hemorrhaging and internal bleeding around the joints.
'You would see a whole family sitting there but they were all dead,' veterinarian Greg Curran told
The Australian. 'It's a disease, it's not a genetic problem. We haven't been able to find a bacteria, we haven't been able to find a virus.
'Parasites, they aren't part of it. Given the huge area and different kinds of country and feed, its very unlikely to be a plant poisoning. You've ruled out all the known causes of diseases.
"The drop is so great it can't simply be due to culling rates. The number of animals that have been harvested for the meat market is low. It can't possibly be starvation or malnutrition,' Dr Curren added.
Comment: Clearly this crater/sinkhole's appearance isn't such a common occurrence and, when we take into account the huge increase in sightings around the world, this could be part of a more concerning phenomenon: