A pair of Robins had made their nest on the horizontal branch of an
evergreen tree which stood near a dwelling house, and the four young had
hatched when a pair of English Sparrows selected the same branch for
their nest. When the Robins refused to vacate their nest, the Sparrows
proceeded to build theirs upon the outside of the Robin's nest. To this
the Robins made no objection, so both families lived and thrived
together on the same branch, with nests touching. The young of both
species developed normally, and in due time left their nests. The branch
bearing both nests is now preserved in the college museum.--_Oberlin
College Bulletin._