It's hard to tell that they are only about an inch long, quite unlike their counterparts that love both the false frangipani and the true one. Now, whether they grow up to be the big ones or not, that would be for my biologist friends to answer, as I couldn't find anything definitive.
What I do know is, both of them work fast.
|How that branch looked this morning|
From the site Silkmoths I found this photo and a lot of information about the Psuedosphinx tetrio (if indeed the smaller version is this!).