On Saturday night in conjunction with the Detroit Lakes Festival of Birds, we listened to Don Kroodsma speak about bird song. This retired professor has studied bird song for years. He records bird song and then studies the sonograms of the sounds they make. He figured out that a brown thrasher has more than 1,000 songs to sing. He also figured out that birds have two voice boxes, one on the left and one on the right. They can use both voice boxes simultaneously. Birds sing a variety of songs at sun rise that they do not repeat until the next sunrise. Time flew by as this speaker blew our minds with his fun facts.
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