Phenology is the biological nature of events as they relate to climate. Each week in our Phenology Talkback segment we hear from listeners who have been paying attention to nature. John Latimer takes a close look at the blooms and changes happening while considering how the timing measures up to past years in his Phenology Report. This week in our talkbacks we heard from Al in Hibbing who wondered about a black swallowtail caterpillar he saw this week. Dave from Remer was concerned about