Establishment of resident Odonata populations on the formerly waterless Cousine Island, Seychelles: an island biogeography theory (IBT) perspective

In March-April 1997, Ceriagrion glabrum, Diplacodes trivialis, Orthetrum brachiale wrighti, Pantala flavescens and Tramea continentalis were resident on Cousine Island. Prior to December 1993, there were no perennial stands of water on the island, and within just over 2 years, these spp. had established as breeding residents, having crossed at least 2.5 km of open sea, probably via the filter route. Cousine is unlikely to support more than about 4 or 5 continuously breeding residents in relation to its size.