A murder of crows sit in a tree in Rochester, Minn. Each year, the birds arrive in mid-November and stay for the winter.
Evan Frost /MPR News
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Rochester's fight with downtown crows and their poop intensifies each winter. Chasing them away falls to a dedicated band of city workers armed with lasers, starter pistols and crow distress calls.
The long economic recovery has brought unemployment to historic lows. But the number of men in the labor force during their prime working age has dropped significantly over the past 50 years.
Jetta Productions Inc./Getty Images
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A murder of crows sit in a tree in Rochester, Minn. Each year, the birds arrive in mid-November and stay for the winter.
Evan Frost /MPR News
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