 Common starlings introduced to areas such as Australia or North America , where other members of the genus are absent , may affect native species through competition for nest holes . In North America , <unk> , <unk> , woodpeckers , purple <unk> and other swallows may be affected . In Australia , competitors for nesting sites include the <unk> and eastern rosellas . For its role in the decline of local native species and the damages to agriculture , the common starling has been included in the IUCN List of the world 's 100 worst invasive species . 
