Some humans feel that swallow nests are a nuisance and unsightly simply because they are attached to man made buildings and structures. Farming is becoming more modernized and the barn swallow is slowly losing places in which to build its nest. Barns and hay lofts are now enclosed, and farm machinery takes up an increasing amount of space. Barns are no longer built to be wide and spacious. Humans may be driving the barn swallow out of their habitat.
Barn swallows spend a large amount of time in the air and have unusually strong flight muscles.
One individual may live up to nine years.