Background

Grassholm is a small island off the southwest coast of Wales. Presently, it is uninhabited and houses the National Nature Reserve — a crucial breeding site for gannets. An abundance of marine life, especially porpoises and bottlenose dolphins, inhabit the adjacent waters. Unfortunately, the island suffers from an influx of marine plastics brought to the island by breeding gannets. The gannets mistakenly identify floating plastic as seaweed and use it as nesting material. 

In-Text 

In the 2009 excerpt from Real Wales, Grassholm is charcterized as being “full of birds” which clearly references the islands significant gannet population. Full in-text reference: “Wales, Grassholm writ just that little it larger. Floating west, full of birds. 

*Wikipedia was consulted for the facts contained herein.