Coturnix coturnix confisa Hartert 1917 (Aves: Phasianidae), a real endemic subspecies or an artifact of science?

Abstract

Based on recent studies about the European Migratory Quail, Coturnix coturnix coturnix (L.), and on the analysis of five specimens identified as Madeiran Quail, Coturnix coturnix confisa Hartert 1917, namely migratory status, measurements and plumage patt