Erratum to: Biol Invasions DOI 10.1007/s10530-014-0823-x

Unfortunately, the fourth sentence in the abstract has been published incorrectly. This sentence is related to the last paragraph of the article main text, which fortunately is correct. Cats have not been introduced: “on at least 179,000 islands worldwide” (as is in the Abstract). As it is indicated in the last paragraph of the main article: “cats have been introduced to at least 5 % of the worlds’ 179,000 small and medium sized islands (B. Tershy, unpubl. data)”.