The article offers information on a house finch's successful use of a barn swallow nest. Topics include, ability to adapt to and thrive in human-dominated landscapes helped house finch & barn swallow to become one of the most widely distributed songbirds & swallows respectively in North America; house finches use twigs, grasses, leaves and a lining of finer materials; and barn swallows use dried mud and grass with a lining of feathers or hair to build nest.