Report Inappropriate Comments

I was fishing at Turner Reservoir in East Providence yesterday 8/21/13 and the DEM had 4 motor boats and several kayaks rounding up swans looks like they were capturing males only. So when does a species become non-invasive? These swans have been here for over 100 years now, according to when they were first brought here. The time frame of their first escape are speculative. So lets say their first escape into the wild was 75 years ago. The species has now established itself here over the course of 75 years. So can they still be considered an invasive species if they have been here for almost 100 years?

From: Swan killing raises questions over efforts to control species

Please explain the inappropriate content below.