Great posting of the map with the areas covered by a variety or ticks which I have never heard of. In Canada, and particularly Manitoba where I live, we have ticks as well. The first I heard of ticks here was in the 60's and only in the Southern parts of the Province. They were given the name Wood Tick but in fact are the same as the American Dog Tick, which variety I'm not sure of.
We have seen an increase in another tick in the last few years and now the Province Health Dept. are sending out warning on the Black Legged Tick, which is the carrier of the Lyme's disease. I was treated for Lyme's Disease in 1999 and at the time was vary uncommon in Canada. Now it is found in most Provinces and can be deadly. There is another that carries Rocky Mountain Spotted Fever.
So, I think it is safe to say that there are ticks pretty well everywhere in North America below the 56th Parallel of Latitude. Just something more to check for when out camping.
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