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Migration of Pallid Harrier across the central Mediterranean
Fig. 5. Migrant Pallid Harriers Circus macrourus recorded in April and May, Strait of Messina, southern Italy,
1997-2000: males, females and second-calendar-year (2CY) birds counted per five-day period (A1, A2, A3, etc.).
These figures show that the peak passage of males was in the third five-day period in April, while counts of
females peaked later in April, in the fifth such period. Numbers of second-calendar-year birds were highest in
late April. In summary, 96% of males recorded were in April (n=49); 75% of females (n=50) were in April,
with 25% (n=16) in May; and 81% (n=70) of juveniles passed through in April and 19% (n=16) in May.
16
(a)
12
8
4
0
A1 A2 A3 A4 A5 A6 M1 M2 M3
16
(b)
12
8
4
0
A1 A2 A3 A4 A5 A6 M1 M2 M3
Fig. 6. Migrant Pallid Harriers Circus macrourus recorded in spring (April and May), Strait of Messina, southern Italy:
males, females and second-calendar-year birds counted per five-day period in (a) 1997-98, and (b) 1999-2000.
242 British Birds 97 • May 2004 • 238-246
