Over the past 320,000 years, turtles in North America have survived through numerous fluctuations in global temperature. When the temperature dropped, they moved to a warmer climate and if it started to get too hot, they headed North. While some turtle species were unable to make the move, the successful species migrated an average of 45 miles for each degree of temperature change.
If you want to find out if a rare bird like the Prairie Warbler is living near you, you can stand out in a field and listen for its call. But that could take hours. Or days. Or months. And you still might miss it.