It means that it is from the western region of the Iberian Peninsula, from western Spain and Portugal. It is an add-on in the name of a species of bird called a palustre scribe. Variety of palustre scribe found on the brink of extinction. Its scientific name is Emberiza schoeniclus lusitanica and belongs to the family Emberizidae . It is believed that only about 110 couples remain. Critically endangered species of palustre scribe according to ornithologists.
