:::That's an interesting comment. But if my reading is correct, WP:FAUNA doesn't say to use an obscure Latin binominal whenever there are multiple common names. As long as we pick a name that is both sufficiently unambiguous and more common than "Sistrurus catenatus", I think it would be an improvement over the current title. The examples in WP:FAUNA seem to concern only whether a candidate common name is sufficiently unambiguous or sufficiently common. In the list above, the candidate names other than "Massasauga" generally seem either ambiguous (a "Gray rattlesnake" or "Spotted rattler" could fit many species) or insufficiently common. For ambiguous names, we need to ignore the hit counts because they include many off-topic results. Some of those names are simply more specific (e.g., obviously, "Prairie Massasauga" and "Swamp Massasauga" are simply more specific topics) or redundant (e.g., "Massasauga rattlesnake" and "Massasauga rattler"). I didn't know about the park – that could generate some false hits, but not very many. I think the park is not a major topic, and may be named after the snake (which is one of the species that the article says is found there). With a Google advanced search that excludes all results that include the word "park", there are still 177,000 hits for "massasauga". —