As of the day of initially writing this, June 18th, I was sitting in my yard, watching a rabbit resting on the lawn. It very likely is the same rabbit that has come and gone from my yard in about a year, so it was less wary around me than it otherwise would be. Anyway, the neighbour’s cat was let out in the yard at some point, and it started peeking through the fence. I am not sure if it was looking at or catching wind the rabbit nearby, or just peeking at me, but the rabbit did noticeably tense up, reacting to its presence. I naturally made the connection of predator and prey upon observing this behaviour.