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Why are bird kills so much bigger on certain nights?

April 26, 2017Bigger bird certain Kills Nights

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Why are bird kills so much bigger on certain nights?

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The weather plays a big role in how many birds are killed on any one night. On overcast nights, birds fly lower and are more likely to be trapped by lights. Favorable winds (in Chicago, south in the spring and north in the fall) produce greater numbers of migrants, hence more deaths.