Radiolab: From Tree to Shining Tree. Trees communicate and collaborate with each other!
Radiolab: The Rhino Hunter. How hunting endangered species can actually help preserve them.
MeatEater Episode 166: Hunting with Teeth. Everything you might ever want to know about wolves (and ecosystems and systemic thinking in general), courtesy of this interview with wolf expert, Diane Boyd.
Invisibilia: Reality, Part 1. Two different versions of "reality" regarding black bears in Eagle's Nest Township, Minnesota.