Figure 4 in At the crossroads from Asia to Europe: spring migration of raptors and black storks in Dadia National Park (Greece)

Figure 4. Polar plot of the directions of migrating raptors and black storks in Dadia NP during spring 2003, 2004 and 2005. The average direction considering all species was 359°. Species are located along the radial axes (scale: log natural) according to the number of individuals observed, ranging from the lesser spotted eagle (n = 29) to the common buzzard (n = 715).