As growing numbers of bats have been forced to abandon traditional roosts in caves and have lost tree cavities, snags, and cliff-face crevices, they have (when possible) moved into manmade structures, such as mines, dams, buildings, and bridges.
(growing numbers of bats; have been forced; to abandon traditional roosts in caves) (growing numbers of bats; to abandon; traditional roosts; L:in caves) (they; have; moved into manmade structures, such as mines, dams, buildings, and bridges)
growing numbers of bats growing numbers of bats they
have been forced to abandon have
to abandon traditional roosts in caves
traditional roosts L:in caves
moved into manmade structures, such as mines, dams, buildings, and bridges