You are welcome in Brasil with your UAV. Above the 250 gram it is obligated to get a permit.
To get a permit, see the links below.
Maximum take-off weight: Above 250 grams you need a permit
Maximum hight: 120 meters / 393 ft.
Maximum horizontal distance: The UAV pilot must keep visual contact at all times with the UAV
Registration: Above 250 gram a permit is obligated
Minimum age: 18 years
Insurance: Liability insurance obligated
Distance Airports / Heliports: 7 km / 4.6 mi
Night flights: Prohibited
Prohibited: CopaCabana, Beaches, citycenter, prisons, soccer stadiums, crowds, vehicles, animals.
ANAC website (request permit).
Department of Airspace Control (DECEA).
If you see these guys deep in the amazone, RUN!!!