Whale has used 52 Hz to call to another Whale for many years.
2017-03-02
2000-08-25
2024-03-16
2016-04-26
2021-07-23
1998-10-11
1971-10-29
2016-11-04
2013-09-29
1965-06-01
2003-04-11
2021-01-02
2016-02-09
1997-06-11
2023-12-15
2022-10-17
2013-11-01
2022-09-01
2017-03-23
2008-01-01
