The Upsweep is an unidentified sound detected by the NOAA, first recorded in August 1991. Almost siren-like, the Upsweep is ...
Fred Sharpe has studied humpback whales in Alaska for more than three decades. He’s particularly interested in the sounds they make – and what they mean. Lately, the biologist has been focusing on the ...
一些您可能无法访问的结果已被隐去。
显示无法访问的结果