http://ec.europa.eu/environment/integration/research/newsalert/newsalert.htm

Science for Environment Policy
Issue 363, 27 February 2014

Plastic pollution measured in Mediterranean seabirds

Endangered Mediterranean seabirds are suffering from ingestion of
plastic litter, a recent study has shown. Overall, 66% of 171 seabirds
studied were found to have plastic fragments in their stomachs and the
critically endangered Balearic shearwater was among the worst affected.

http://ec.europa.eu/environment/integration/research/newsalert/pdf/363na2.pdf