Fig. 1
The long-term trends in the peak numbers of Bewick’s, Mute, and Whooper Swans counted on the Ouse Washes as part of the Wetland Bird Survey (WeBS) monitoring programme (Frost et al. 2019)
Fig. 1 | Avian Research
The long-term trends in the peak numbers of Bewick’s, Mute, and Whooper Swans counted on the Ouse Washes as part of the Wetland Bird Survey (WeBS) monitoring programme (Frost et al. 2019)
Avian Research