But a hundred years ago, birds were seen as the best remedy for the weeds and insect pests that threatened the country’s food supply and cost farmers hundreds of millions of dollars every year. And in order to identify the precise impact that birds had on agriculture, a field called economic ornithology was born. According to one of its leading practitioners, economic ornithology was “the study of birds from the standpoint of dollars and cents … in short, it is the practical application of the knowledge of birds to the affairs of everyday life.”1 And from the 1880s to the 1930s, birds were widely seen as economic agents, working alongside farmers in the fight against the insect hordes.
By the 1940s, economic ornithology had become discredited and obsolete. Effective and affordable pesticides had entirely replaced the birds’ bug-killing role, while economic ornithologists could never prove that their methods actually increased the number of helpful birds. But before their role in agriculture was dismissed, there was a time when we believed that we depended on birds for our food, and for our very survival.
And here was the method of economic ornithology:
In 1916, Gilbert Trafton summarized the primary approach used by economic ornithologists: “The practical value of birds to man, whether helpful or harmful, depends chiefly on their food habits,” and by examining what they eat, “the exact economic status of a bird is determined.” Sometimes this was done by observing the behaviors of birds in the field, but it usually meant dissecting birds and seeing what they had in their stomachs.
Here is the full Substack, by Robert Francis. Via Philip Wallach.
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