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 the Prairie

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Sandhill Crane Counts - Week 6

Andrew Caven, Lead Biologist

Our aerial count for this week are 208,600, with an absolute error of +/-12.9%. We had a mechanical malfunction on the plane before takeoff and had to change a light. This set us back about 20 minutes in terms of start time; this may have been precious time in terms of counting. We usually start about 25-30 minutes before sunrise (civil twilight), but today we got started just 5 or 10 minutes before sunrise. As the Sandhill Crane migration progresses birds move farther and farther afield, away from the river, to forage on…


The Great Migration