sub:Provenance { sub:Assertionprov:wasDerivedFromsub:Study . sub:Studydcterms:bibliographicCitation "Green, A.J. and M.I. Sanchez. 2003. Spatial and temporal variation in the diet of Marbled Teal Marmaronetta angustirostris in the western Mediterranean: This globally threatened species is less dependent on invertebrates and more dependent on seeds than other ducks. Bird Study 50:153-160." . }