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% of individuals
% of individuals
60
50
40
30
20
10
0
60
50
40
30
20
10
0
A
C
P1 P2 P3 P4 P5 P6 P7 P8 P9 M.C.
Remiges
P1 P2 P3 P4 P5 P6 P7 P8 P9 M.C.
Remiges
% of individuals
% of individuals
60
50
40
30
20
10
0
60
50
40
30
20
10
0
B
D
P1 P2 P3 P4 P5 P6 P7 P8 P9 M.C.
Remiges
P1 P2 P3 P4 P5 P6 P7 P8 P9 M.C.
Remiges
FiguRe 1: molting PatteRn oF PRimaRy Remiges in Progne chalybea winteRing in PResidente dutRa. (A) May, n = 29; (B) June, n = 35; (C) July, n = 20;
(D) August, n = 25. M.C. = Molt Completed.
% of individuals
% of individuals
80
70
60
50
40
30
20
10
0
80
70
60
50
40
30
20
10
0
A
C
Molt cycle of the Gray-Breasted Martin (Hirundinidae: Progne chalybea) in a wintering area in Maranhão, Brazil 437
R1 R2 R3 R4 R5 R6 M.C.
Retrices
R1 R2 R3 R4 R5 R6 M.C.
Retrices
% of individuals
% of individuals
80
70
60
50
40
30
20
10
0
80
70
60
50
40
30
20
10
0
B
D
R1 R2 R3 R4 R5 R6 M.C.
Retrices
R1 R2 R3 R4 R5 R6 M.C.
FiguRe 2: molting PatteRn oF RectRices in Progne chalybea winteRing in PResidente dutRa. (A) May, n = 29; (B) June, n = 35; (C) July, n = 20; (D) August,
n = 25. M.C. = Molt Completed.
Retrices