Condo living -- Cliff Swallows
Channel: TerraNaturalist
Date: 30/10/2012

Before humans arrived and built numerous roads that crisscrossed the landscape, Cliff Swallows nested on the vertical slopes of cliffs. Today, hordes of swallows build gourd-shaped nests under bridges and the eves of buildings. This short video, as part of the Terra Explorer Project, gives a glimpse into the lives of Cliff Swallows. Have you ever wondered why Cliff Swallows breed in such dense colonies or build such elaborate nests? (View the video for insightful possibilities)