Rooiwal Sewage Works (25342814) | |
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Gauteng | |
CWAC status | REGISTERED-COUNTED REGULARLY |
Authority | Private |
Management status | TOWN COUNCIL PROPERTY |
Conservation status | UNPROTECTED |
IBA information | |
Ramsar information | |
Heritage information | |
View Cards | Click here |
Information |
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Date_registered |
1993-01-31 |
Brief_description |
Open sewage tanks and several shallow sedimentation ponds, with fringing reedbeds and some floating vegetation. Holds a good variety of waterbirds; counts usually total c. 500 birds but were high in summer 1993 (large numbers of Cattle Egret, Sacred Ibis, Redknobbed Coot, Ruff and Whitewinged Tern), winter 1996 (1215 Whitefaced Duck) and summer 1997 (Cattle Egret, Wood Sandpiper, Ruff and Whitewinged Tern were numerous). Exceptional concentrations of large waterbirds are reflected in relatively high biomass totals for summer 1993 and winter 1996. High counts of Yellow Wagtails in four of six summers. Mild threats are posed by the periodic invasion of alien waterplants, the periodic drainage and scraping of sedimentation dams, and human disturbance during working hours. |
Spp | Common name | Taxonomic name | Min | Avg | Max | IBA | Subregional IBA | RAMSAR |
---|---|---|---|---|---|---|---|---|
72 | , Hamerkop | Scopus umbretta | 1 | 1.95 | 6 | |||
1016 | , Mallard | Anas platyrhynchos | 1 | 1.00 | 1 | |||
256 | , Ruff | Calidris pugnax | 1 | 228.52 | 1500 | |||
269 | Avocet, Pied | Recurvirostra avosetta | 1 | 2.75 | 6 | |||
67 | Bittern, Little | Ixobrychus minutus | 1 | 1.00 | 1 | |||
212 | Coot, Red-knobbed | Fulica cristata | 5 | 86.67 | 337 | |||
50 | Cormorant, Reed | Microcarbo africanus | 1 | 24.26 | 117 | |||
47 | Cormorant, White-breasted | Phalacrocorax lucidus | 1 | 11.50 | 52 | |||
203 | Crake, Black | Zaporina flavirostra | 1 | 1.89 | 9 | |||
52 | Darter, African | Anhinga rufa | 1 | 7.83 | 31 | |||
95 | Duck, African Black | Anas sparsa | 1 | 4.25 | 14 | |||
10006 | Duck, Domestic | Anas platyrhynchos domesticus | 1 | 1.00 | 1 | |||
101 | Duck, Fulvous Whistling | Dendrocygna bicolor | 1 | 11.06 | 72 | |||
91 | Duck, Knob-billed | Sarkidiornis melanotos | 1 | 23.90 | 127 | |||
10014 | Duck, Unidentified | Anas sp. | 1 | 1.25 | 2 | |||
104 | Duck, White-backed | Thalassornis leuconotus | 1 | 11.33 | 37 | |||
100 | Duck, White-faced Whistling | Dendrocygna viduata | 8 | 307.55 | 1362 | |||
96 | Duck, Yellow-billed | Anas undulata | 1 | 45.70 | 137 | |||
58 | Egret, Great | Ardea alba | 1 | 2.33 | 5 | |||
60 | Egret, Intermediate | Ardea intermedia | 1 | 1.86 | 3 | |||
59 | Egret, Little | Egretta garzetta | 1 | 4.27 | 15 | |||
61 | Egret, Western Cattle | Bubulcus ibis | 3 | 113.45 | 443 | |||
149 | Fish Eagle, African | Haliaeetus vocifer | 1 | 1.00 | 1 | |||
86 | Flamingo, Greater | Phoenicopterus roseus | 1 | 1.00 | 1 | |||
89 | Goose, Egyptian | Alopochen aegyptiaca | 2 | 19.10 | 104 | |||
88 | Goose, Spur-winged | Plectropterus gambensis | 1 | 3.38 | 17 | |||
4 | Grebe, Great Crested | Podiceps cristatus | 1 | 1.00 | 1 | |||
6 | Grebe, Little | Tachybaptus ruficollis | 4 | 72.72 | 243 | |||
263 | Greenshank, Common | Tringa nebularia | 1 | 4.38 | 13 | |||
288 | Gull, Grey-headed | Chroicocephalus cirrocephalus | 1 | 50.00 | 398 | |||
287 | Gull, Kelp | Larus dominicanus | 32 | 32.00 | 32 | |||
167 | Harrier, African Marsh | Circus ranivorus | 1 | 1.50 | 2 | |||
64 | Heron, Black | Egretta ardesiaca | 1 | 1.00 | 1 | |||
55 | Heron, Black-headed | Ardea melanocephala | 1 | 4.91 | 26 | |||
56 | Heron, Goliath | Ardea goliath | 2 | 2.00 | 2 | |||
54 | Heron, Grey | Ardea cinerea | 1 | 4.78 | 17 | |||
57 | Heron, Purple | Ardea purpurea | 1 | 2.61 | 10 | |||
62 | Heron, Squacco | Ardeola ralloides | 1 | 6.80 | 35 | |||
63 | Heron, Striated | Butorides striata | 1 | 2.39 | 5 | |||
81 | Ibis, African Sacred | Threskiornis aethiopicus | 2 | 35.15 | 151 | |||
83 | Ibis, Glossy | Plegadis falcinellus | 1 | 45.68 | 650 | 500 | ||
84 | Ibis, Hadada | Bostrychia hagedash | 1 | 11.56 | 41 | |||
228 | Jacana, African | Actophilornis africanus | 1 | 6.27 | 17 | |||
395 | Kingfisher, Giant | Megaceryle maxima | 1 | 1.50 | 3 | |||
397 | Kingfisher, Malachite | Corythornis cristatus | 1 | 1.00 | 1 | |||
394 | Kingfisher, Pied | Ceryle rudis | 1 | 2.85 | 10 | |||
247 | Lapwing, African Wattled | Vanellus senegallus | 1 | 8.92 | 37 | |||
245 | Lapwing, Blacksmith | Vanellus armatus | 3 | 82.33 | 340 | |||
509 | Martin, Brown-throated | Riparia paludicola | 1 | 1.00 | 1 | |||
210 | Moorhen, Common | Gallinula chloropus | 1 | 5.39 | 29 | |||
172 | Osprey, Western | Pandion haliaetus | 1 | 1.00 | 1 | |||
241 | Plover, Grey | Pluvialis squatarola | 2 | 2.00 | 2 | |||
237 | Plover, Kittlitz's | Charadrius pecuarius | 2 | 8.75 | 21 | |||
238 | Plover, Three-banded | Charadrius tricollaris | 1 | 6.97 | 35 | |||
102 | Pochard, Southern | Netta erythrophthalma | 2 | 75.78 | 548 | 500 | 250 | 460 |
282 | Pratincole, Black-winged | Glareola nordmanni | 85 | 85.00 | 85 | 50 | ||
258 | Sandpiper, Common | Actitis hypoleucos | 1 | 5.86 | 31 | |||
251 | Sandpiper, Curlew | Calidris ferruginea | 2 | 18.33 | 50 | |||
262 | Sandpiper, Marsh | Tringa stagnatilis | 1 | 3.61 | 21 | |||
264 | Sandpiper, Wood | Tringa glareola | 1 | 43.08 | 288 | |||
90 | Shelduck, South African | Tadorna cana | 1 | 1.00 | 1 | |||
94 | Shoveler, Cape | Anas smithii | 1 | 8.50 | 74 | |||
250 | Snipe, African | Gallinago nigripennis | 3 | 3.00 | 3 | |||
85 | Spoonbill, African | Platalea alba | 1 | 2.75 | 4 | |||
270 | Stilt, Black-winged | Himantopus himantopus | 3 | 36.93 | 116 | |||
253 | Stint, Little | Calidris minuta | 1 | 65.82 | 450 | |||
78 | Stork, Abdim's | Ciconia abdimii | 21 | 21.00 | 21 | |||
79 | Stork, Black | Ciconia nigra | 3 | 3.00 | 3 | |||
80 | Stork, White | Ciconia ciconia | 6 | 6.00 | 6 | 1 | ||
76 | Stork, Yellow-billed | Mycteria ibis | 1 | 1.00 | 1 | |||
208 | Swamphen, African | Porphyrio madagascariensis | 1 | 2.83 | 7 | |||
884 | Swan, Mute | Cygnus olor | 2 | 2.00 | 2 | |||
99 | Teal, Blue-billed | Anas hottentota | 1 | 4.00 | 15 | |||
98 | Teal, Cape | Anas capensis | 1 | 4.74 | 27 | |||
97 | Teal, Red-billed | Anas erythrorhyncha | 1 | 27.06 | 135 | |||
290 | Tern, Caspian | Hydroprogne caspia | 2 | 2.00 | 2 | |||
305 | Tern, Whiskered | Chlidonias hybrida | 1 | 1.00 | 1 | |||
304 | Tern, White-winged | Chlidonias leucopterus | 1 | 147.00 | 751 | |||
274 | Thick-knee, Water | Burhinus vermiculatus | 2 | 2.00 | 2 | |||
10008 | Wader, Unidentified | N/A N/A | 240 | 240.00 | 240 | |||
685 | Wagtail, African Pied | Motacilla aguimp | 1 | 4.23 | 15 | |||
686 | Wagtail, Cape | Motacilla capensis | 2 | 23.26 | 71 | |||
689 | Wagtail, Western Yellow | Motacilla flava | 2 | 14.83 | 47 |