How does agriculture affect vulnerable insect-eating birds?

How does agriculture affect vulnerable insect-eating birds?

Aerial insectivores -- birds that hunt for insect prey on the wing -- are declining across North America as agricultural intensification leads to diminishing insect abundance and diversity in many areas. A new study looks at how tree swallows' diets are affected by agriculture and finds that while birds living in cropland can still find their preferred prey, they may be working harder to get it.

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