Nests can also be found next to railroads and under highway embankments. Exotic species are no threat to the bank swallow. This is because of their unique nesting habitat requirements. Erosion and human interference, insect infestation and predators threaten the Bank swallows. Even though, erosion is sometimes necessary to create vertical cliffs necessary for building nests.
Predators also are a threat.
Along cliff faces, coastal erosion threatens to destroy their homes. Along riverbanks, erosion control projects such as bank stabilization and flood control projects threaten their habitat. Food Bank swallows are not the largest of passerines and this is reflected in their diet. The swallows feed singly or in pairs in a flock. Parents bring back on average 60 prey items to the nest.