Introduction: A long-term study of Yellow Wagtails (Motacilla flava) at roosts in SW Scania, Sweden |
For readers from other continents: The Yellow Wagtail Motacilla flava breeds with numerous subspecies throughout the Palearctic. The subspecies flava breeds in the southern half of Sweden, in southern Finland and in southernmost Norway, the subspecies thunbergi in northern Sweden, northern Finland and most of Norway, in addition there are hybrids in a zone of encounter in all three countries. Adults moult completely in late summer and the end of moult is exactly synchronized with the start of migration. |
Year, site | Total | 1y | 2y+ | 1y+ | Main interval | No. of catches in main interval | Average catch/occasion in main interval | Average no. of nets (no. of occasions) |
---|---|---|---|---|---|---|---|---|
FOV, 1967 | 1035 | 895 | 140 | 69 | 22.8-12.9 | 13 | 75 | 7.0 (7) |
FOV, 1968 | 904 | 388 | 37 | 479 | 20.8-6.9 | 10 | 82 | - |
FOV, 1969 | 1138 | 803 | 130 | 205 | 19.8-12.9 | 12 | 87 | - |
FOV, 1970 | 1390 | 1241 | 144 | 5 | 17.8-11.9 | 18 | 72 | - |
FOV, 1971 | 843 | 722 | 118 | 3 | 19.8-13.9 | 17 | 46 | - |
FOV, 1972 | 665 | 578 | 52 | 35 | 28.8-11.9 | 12 | 53 | - |
FOV, 1973 | 1723 | 1530 | 192 | 1 | 15.8-8.9 | 23 | 74 | - |
FOV, 1974 | 1314 | 1063 | 229 | 22 | 19.8-10.9 | 17 | 76 | - |
FOV, 1975 | 2200 | 1881 | 305 | 20 | 14.8-9.9 | 20 | 104 | 6.8 |
FOV, 1976 | 2437 | 2242 | 176 | 19 | 14.8-12.9 | 24 | 97 | 6.2 |
FOV, 1977 | 1913 | 1548 | 336 | 29 | 15.8-11.9 | 23 | 82 | 7.3 |
FOV, 1978 | 925 | 823 | 94 | 8 | 16.8-8.9 | 10 | 90 | 7.6 |
LNÄ1 1979 FOV 1979 | 428 | 369 | 59 | - | 25.8-4.9 | 4 | 107 | 6.5 |
902 | 789 | 110 | 3 | 17.8-9.9 | 15 | 58 | 7.3 | |
LNÄ 1980 FOV 1980 | 482 | 452 | 30 | - | 1.9-10.9 | 5 | 97 | 7.4 |
927 | 800 | 117 | 4 | 25.8-11.9 | 16 | 58 | 7.5 | |
LNÄ 1981 FOV 1981 | 1157 | 907 | 250 | - | 7.8-16.9 | 11 | 104 | (11.3)2 |
1066 | 830 | 222 | 14 | 19.8-9.9 | 15 | 69 | 8.9 | |
LNÄ 1982 FOV 1982 | 937 | 820 | 117 | - | 15.8-5.9 | 7 | 133 | 9.0 |
1580 | 1154 | 394 | 32 | 16.8-10.9 | 18 | 86 | 10.8 | |
LNÄ 1983 FOV 1983 | 2033 | 1737 | 296 | - | 17.8-14.9 | 13 | 152 | 8.3 |
1892 | 1575 | 287 | 30 | 15.8-14.9 | 22 | 84 | 11.2 | |
LNÄ 1984 FOV 1984 | 1625 | 1286 | 338 | 1 | 9.8-10.9 | 13 | 124 | 5.5 |
1471 | 1062 | 341 | 68 | 20.8-10.9 | 14 | 104 | 12.6 | |
LNÄ 1985 FOV 1985 | 1861 | 1458 | 403 | - | 15.8-2.9 | 15 | 97 | 6.1 |
1099 | 885 | 208 | 6 | 19.8-10.9 | 17 | 64 | 8.9 | |
LNÄ 1986 FOV 1986 | 2281 | 1994 | 287 | - | 11.8-13.9 | 18 | 126 | 6.7 |
3775 | 3110 | 630 | 35 | 13.8-13.9 | 30 | 126 | 9.3 | |
LNÄ 1987 FOV 1987 | 2750 | 2098 | 648 | 4 | 16.8-8.9 | 17 | 161 | 9.1 |
2658 | 2094 | 546 | 18 | 16.8-13.9 | 23 | 114 | 10.3 | |
LNÄ 1988 FOV 1988 | 2837 | 2321 | 516 | - | 14.8-17.9 | 21 | 135 | 9.2 |
4914 | 4147 | 750 | 17 | 9.8-17.9 | 33 | 147 | 10.3 | |
LNÄ 1989 FOV 1989 | 1417 | 1159 | 258 | - | 13.8-14.9 | 13 | 108 | 7.5 |
4504 | 3851 | 615 | 38 | 10.8-14.9 | 31 | 141 | 12.0 | |
LNÄ 1990 FOV/KLH 1990 LJH 1990 | 1063 | 911 | 152 | - | 13.8-5.9 | 8 | 132 | 6.8 |
2641 | 2417 | 213 | 11 | 10.8-10.9 | 27 | 97 | -3 | |
898 | 823 | 64 | 11 | 17.8-12.9 | 20 | 45 | 4.9 | |
LNÄ 1991 FOV/KLH 1991 | 1030 | 848 | 182 | - | 20.8-9.9 | 8 | 123 | 8.0 |
880 | 764 | 108 | 8 | 26.8-13.9 | 12 | 73 | 7.9 | |
LNÄ 1992 FOV 1992 | 872 | 669 | 203 | - | 18.8-10.9 | 8 | 107 | 5.4 |
1140 | 957 | 174 | 9 | 14.8-9.9 | 10 | 111 | 8.0 | |
LNÄ 1993 FOV/KLH 1993 | 637 | 544 | 93 | - | 22.8-12.9 | 7 | 89 | 5.7 |
1455 | 1158 | 219 | 78 | 15.8-16.9 | 13 | 107 | 6.1 | |
LNÄ 1994 FOV 1994 | 1642 | 1332 | 310 | - | 17.8-7.9 | 11 | 146 | 6.3 |
1277 | 1054 | 211 | 12 | 10.8-17.9 | 15 | 82 | 7.6 | |
LNÄ 1995 FOV 1995 | 497 | 368 | 128 | 1 | 17.8-19.9 | 6 | 83 | - |
738 | 651 | 81 | 6 | 16.8-12.9 | 9 | 81 | 7.1 | |
LNÄ 1996 | 971 | 797 | 174 | - | 25.8-14.9 | 7 | 136 | 6.0 |
LNÄ 1997 FOV 1997 | 1458 | 1171 | 287 | - | 13.8-3.9 | 11 | 131 | 7.3 |
593 | 521 | 67 | 5 | 21.8-31.8 | 7 | 85 | 6.7 | |
FOV 1999 | 427 | 376 | 49 | 2 | 20.8-10.9 | 6 | 69 | 6.2 |