Flying insects live on the edge of death every second of their short lives, the very fact that they are flying at all is a precarious balance, dependent on how hydrated they are (most insects die from dehydration) and factors like how warm they are. When the sun slips bend a cloud, insects will cool slightly, and some lose the ability to fly and drop out of the air onto the river, where a trout will be expecting them.
T. Gooley, How to read water (2016), 87
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