Figure 3 in At the crossroads from Asia to Europe: spring migration of raptors and black storks in Dadia National Park (Greece)

Figure 3. Performance of the 34 sampling units for raptor migration surveys. Numbers represent the average of migrating individuals and species among the three years 2003, 2004 and 2005. Each sampling unit was surveyed for 5 h in each of the five months March, April, May, June and July.