If they are already there, it is illegal to harass
them or destroy the nest. Try using another door
for a couple of weeks. Also, you can try to remove
all horizontal ledges the following winter, but
remember that these birds are helpful insect
eaters! Barn swallows are insectivores. Flies,
grasshoppers, crickets,dragonflies, beetles, moths
and other flying insects make up 99 % of their
diet. They catch most of their prey while in
flight, and are able to feed their young at the
nest while flying.
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