@Kyle Gervis in Florida, we have 3 naturalized species of Australian Pine. Casuarina equisetfolia is probably the one species I see the most of. I live in Pinellas County, a small peninsula in Florida. This species is the most tolerant to salty air and coastal spray, and least tolerant to frost. On the coast, you find a lot of driftwood from Cauarina equisetfolia that can make for really cool crafts or wall art because of how strong and resistant to decaying it is. Casuarina cunninghamiana is found a little more inland, maybe just far enough from the coast to be safe from coastal spray and heavy salt content in the air. We call them whispering pines because of the sound they make when the wind blows through a canopy of them. When I was a kid, my brothers and I would climb to the tops of smaller trees and they would bend over to the next tree. We could go from tree to tree to tree. I see a lot of owls in this species of Casuarina. We also have Casuarina glauca out here, but I’m not sure if I recall seeing it where I live and I’m not confident in being able to identify it.