Spatial distribution of Wasmannia auropunctata (red) and Linepithema iniquum (white/gray) arboreal nests over a 7-ha plot in Puerto Rico. W. auropunctata nests dominate the largest patch (1-ha). Individual trees with W. auropunctata are scattered within smaller clusters of L. iniquum nests, while in the W. auropunctata patch several trees are occupied by L. iniquum.