Foreword on the ecology and impact of non-indigenous birds by Daniel Sol, Tim Blackburn, Phillip Cassey, Richard Duncan and Jordi Clavell. With 80 colour plates, over 400 colour photographs, 737 distribution maps, 6000 bibliographical references. Summary: Introduction. I) Order PASSERIFORMES : Family CAMPEPHAGIDAE (Cuckoo-shrikes). Family PYCNONOTIDAE (Bulbuls). Family CHLOROPSEIDAE (Leafbirds). Family IRENIDAE (Fairy-bluebirds). Family AEGITHINIDAE (Ioras). Family PTILOGONATIDAE (Silky-flycatchers). Family BOMBYCILLIDAE (Waxwings). Family HYPOCOLIIDAE (Hypocolius). Family DULIDAE (Palmchat). Family CINCLIDAE (Dippers) . Family TROGLODYTIDAE (Wrens) . Family MIMIDAE (Mockingbirds and Thrashers). Family PRUNELLIDAE (Accentors). Family TURDIDAE(Thrushes). II) REFERENCES. References of Scientific Descriptions. General List of References. INDEX