The nearly half-century tally of birds that fly over Hawk Ridge every autumn is really a snapshot of annual migration, impacted by weather and natural cycles, and not necessarily a population survey.
But the tale of two raptors that fly over Duluth, Minn., on their way south each autumn are shining examples of what researchers are seeing across North America _ two birds heading the same way this time of year way but going in opposite directions as a species.
As of last week more than 1,200 bald eagles had been counted over Hawk Ridge, ahead of even last year's record pace.
Only eight northern goshawks had flown over.
