Carey Institute of Environmental Studies http://www.caryinstitute.org/newsroom/opossums-killers-ticks
Some good news for those who share nature with these creatures. Opossums have an ancient trail that traverses my yard along the building/patio. I've been blaming them as being the Source of the ticks close to my building. This article proves that wrong. I am benefiting from their presence. Seems that unlike the other animals tested, they groom ticks (eating them) before they become attached, eating up to 5,000 est. Oh, and they have immunity from rabies....who knew!