Wow that's interesting. Do you have any thoughts yet as to what might be contributing to this? I know you said the cause is not yet known but just wondering if you have any ideas yet? In Australia there has been a recent problem of Tasmanian Devils contracting fatal facial tumours which threatens their existence. http://www.abc.net.au/rn/scienceshow...07/1902683.htm
and
http://www.cosmosmagazine.com/node/1663
The rate of extinction of species is a problem right now as it is happening at unprecedented rates.
This following explains more.

http://www.abc.net.au/am/content/2006/s1585594.htm