That said, in my color green they won't need a visa, but they will get a 30-day visa exemption. If they want to stay longer they'll need to apply for a visa.
It's interesting that they need a visa for travel to the US/Canada but are visa-free for Europe. Normally for most developing countries, if one of those regions require a visa, the others also do and vice versa. I would've thought the EU will require a visa.
Both Australia and Antarctica are a slightly darker shade of grey, I don't think they qualify for "visa required". According to this map, if you're brazilian, you can never visit Australia.