Environmental Engineering Reference
In-Depth Information
Table 3.7 Results of observed cumulative palaearctic migrant bird mortalities in all quadrants
(plots)
Species
No. alive
No. dead
Percent mortality
Ringed plover
5
2
40
Common greenshank
2
Wood sandpiper
467
126
26.98
Marsh sandpiper
3
2
66.7
Green sandpiper
1
Black-tailed godwit
500
215
43
Common snipe
16
10
62.5
Yellow wagtail
14
4
28.57
Ruff
3
Table 3.8 Results of observed cumulative resident and intra-African migrant bird mortalities
Species
No. alive
No. dead
Percent mortality
Abdim's stork
29
26
89.69
African openbill
5848
2261
38.66
Marabou stork
10
3
30
Glossy ibis
39
6
15.38
Hadada ibis
6
1
16.67
Cattle egret
21
9
42.86
Little egret
8
3
37.5
Senegal plover
4
Greater painted snipe
4
1
25
Long-crested eagle
2
Black kite
1
Doves and pigeons
1570
391
24.9
Grassland pipit
2
1
50
Red-billed quelea
50
12
24
Fan-tailed widowbird
11
8
72.72
Parasitic weaver
6
4
66.67
Village weaver
50
2
4
migrants were lost, representing an annual rate of 45% mortality. In addition, 2 734 of the observed 7
654 intra-African migrant birds were poisoned, which represented a mortality rate of nearly 38%.
The analysis that follows examines the impact of poisoning (and the subsequent population
decline) on palaearctic migrants, birds that winter in Africa from Europe; e.g., wood sandpiper
( Tringa glareola ), black-tailed godwit ( Limosa limosa ) and the intra-African migrants which move
within Africa, including the African openbill, Abdim's stork ( Ciconia abdimii ) and glossy ibis
( Plegadis falcinellus ). The comparative mortality within species (mortality against total numbers)
and individual species losses (percentage mortality rate) are tabulated in Tables 3.7 and 3.8.
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