Figure 1: Sonograms of basic call (cri fundamental, left) and trumpeting call (trompettements, right) of Yellow-legged Gulls on the island of Oléron (pop. 1), the Camargue (pop. 2) and Basque Country (pop. 3).
Data from:
Comparative study of four populations of Yellow-legged Gulls in Western Europe by Anne TEYSSEDRE
IN: L'Oiseau et R.F.O., V. 53, 1983, n° 1.
above: the island of Oléron (pop. 1)
above: the Camargue (pop. 2)
above: Basque Country (pop. 3) |