[Geographic song variations of the short-toed tree creeper (Certhia brachydactyla) with regard to the problem of species formation].
D000220:Adaptation, Biological; D000818:Animals; D001522:Behavior, Animal; D005075:Biological Evolution; D001717:Birds; D004777:Environment; D005860:Germany, West; D007858:Learning; D013030:Spain; D013045:Species Specificity
Gesangsgeographische Variation des Gartenbaumläufers (Certhia brachydactyla) im Hinblick auf das Artbildungsproblem.