Introduced house sparrows are serious nest-site competitors with barn swallows and will take over nests and destroy eggs and nestlings.
In North America, introduced house sparrows (Passer domesticus) are serious nest-site competitors, taking over nests and destroying eggs and nestlings.
• Image | © daniela de gol, Some Rights Reserved, Unsplash
• Sources | (BirdLife International, 2016; Turner & Christie, 2017)
