Barn swallows are often seen in large social groups and nest colonially, as a result of the distribution of high quality nests.
Barn swallows are often seen in large social groups sitting on telephone wires or other elevated structures.
Barn swallows also nest colonially, probably as a result of the distribution of high quality nest sites. Within a colony, barn swallows defend a territory around their nest. In European barn swallows, these territories range in size from about 4 to 8 square meters.
• Image | © Hassan Pasha, Some Rights Reserved, Unsplash
• Sources | (Hebblethwaite & Shields, 1990; Roth, 2002; Moller, 1991)
