Source: https://healthjournalism.org/blog/2025/07/lyme-disease-is-changing-in-a-warming-world-and-so-should-the-news/

When biologist Nick Ogden moved to Quebec in 2002, there were two known populations of the black-legged tick (Ixodes scapularis) — the most important Lyme disease spreader — in Canada, on the north shore of Lake Erie. 

Ogden ran computer models to predict other places in Canada that the tick could be setting up shop. He began to monitor these locations for new tick populations, including a park near his home that he visits every weekend. He found the first tick there in 2009. Now, there are so many that he’s been able to use this location in research on ticks in the wild.