Facebook logo Twitter logo YouTube logo Podcast logo RSS feed logo

Did Ja Know?

Thirty years ago, 26 bald eagles were counted by bird watchers over about 200 hours as the birds migrated south along the edge of Lake Superior over Hawk Ridge in Duluth. This year, thanks to laws banning the use of DDT and PCBs that allowed eagle populations to recover, counters expect see about 4,000 eagles over 350 hours. This amounts to about 11 eagles per counting hour versus 0.1 eagle per hour in 1976.

Source: Hawk Ridge Bird Observatory


By Sea Grant Staff
October 2006

Return to October 2006 Seiche



This page last modified on December 12, 2017     © 1996 – 2017 Regents of the University of Minnesota     The University of Minnesota is an equal opportunity educator and employer.
Facebook logo Twitter logo YouTube logo Podcast logo RSS feed logo
Logo: NOAA Logo: UMD Logo: University of Minnesota Logo: University of Minnesota Extension