Song dialects as diagnostic characters — acoustic differentiation of the Canary Island Goldcrest subspecies Regulus regulus teneriffae Seebohm 1883 and R. r. ellenthalerae Päckert et al. 2006 (Aves: Passeriformes: Regulidae)
. Zootaxa, 1325(1), 99–115. https://doi.org/10.11646/zootaxa.1325.1.7