It is indeed a greenhouse frog. They're another of the introduced animals here.(FL) They are interesting in that they have no tadpole stage, but rather "hatch" from the eggs often layed in potted plants. (greenhouses). As for food, pin head crickets would probably be o.k. Give it a typical "bog" environ w/ both dry and damp areas. They are often found (all over my house) in wood piles and the like. I often see that s. ringnecks eat them, however I am unsure of the toxicity of their skin secretions. I'm sure if you could get small enough insects and their larvae, you will have little trouble in keeping him happy.