Translation of "terzet" into German

All the terzets, quartets, quintets took place within dense shrubbs, to which the birds had approached hidden, from bush to bush.

Alle Terzette, Quartette und Quintette fanden innerhalb dichten Buschwerks statt, an das sich die Tiere zuvor meist „von Busch zu Busch und versteckt“ angenähert hatten.