A cobra está fumando! Yes, it's the patch of the FEB. My wife's late father served with the FEB in Italy. Almost certainly a repro, originals are pretty rare these days but super cool none the less. Supposedly, according to legend, a response to an almost certainly apocryphal remark by Hitler that he would be more likely to see a snake smoking than Brazilians fighting in the war.
In reality few of those patches or the multiple variations therof were worn during the actual fighting most were produced after the war ended. The shoulder badge worn by most, when it was worn was a fairly plain green shield with the title ' Brasil' on it.
Super cool item and a real conversation piece. If you are interested in the FEB then there's an English translation available of their commanding general's work. Look for Mascarenhas de Moraes: The FEB by its Commander. There was a Brazilian feature film being produced on the subject a few years ago but I'm not sure whether it ever made it to release. By th e by the Osprey on the FEB isn't too bad for once.