If you really want to challenging your bird identification skills, try using them at night, when bird calls are less than 100 milliseconds long.
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Jul 2020
For the Birds
In the spring of 1958, when the winter snow melted and the warm sun returned, the birds did not. Birdwatchers, ordinary people, everyone wondered where the birds had gone. Rachel Carson, a journalist and early environmentalist, figured it out — they’d been poisoned by DDT, a pest ... Show More
46m 52s