Nest-site competition between invasive and native cavity nesting birds


Nest-site competition between invasive and native cavity nesting birds

There is an ongoing discussion on whether invasive cavity nesting birds restrict the availability of this key limited resource. Invasive alien species potentially can reduce the breeding of native cavity breeders both by exploiting the limited breeding resource (nest cavities) (exploitation competition) and by directly usurping cavities already occupied by the native species (interference competition). We are in a middle of a field study using a Before-After-Control-Impact (BACI) design using nest boxes to determine whether larger alien birds limit the breeding of native species. Our goal is to not only increase our scientific knowledge but also to propose management practices using nest-boxes in order to reduce competition between native cavity breeders and alien invasive birds.