Nature Key Facts —The recovery. Brazil’s humpback population has grown from about 1,000 animals in 1988 to more than 30,000 today. —The season. Whales pass the Rio coast between June and November, with the Cagarras Islands the city’s main viewing ground. —The journey. They swim nearly 9,000km a year between Antarctic feeding grounds and Brazilian […] The post Humpback Whales Return to Rio, and the Boats Follow appeared first on The Rio Times.