A Mud Source

Since Cliff Swallows construct their nests out of mud, a mud source is an important habitat feature. Farming activities and livestock create readily available mud, but with the decline in small farms and agriculture in general in the northeast, there is less mud available at nesting sites. Cliff Swallows are attracted to mud, and the bigger the puddle, the better. Cliff Swallows will not collect mud in areas surrounded by tall vegetation, so keep grass short around mud sources.