Vaalharts Weir (28072455) | |
|---|---|
Northern Cape | |
| CWAC status | REGISTERED-COUNTED IRREGULARLY |
| Authority | Northern Cape Department of Tourism, Environment and Conservation |
| Management status | PRIVATE FARM |
| Conservation status | PARTLY PROTECTED |
| IBA information | |
| Ramsar information | |
| Heritage information | |
| View Cards | No |
Information |
|---|
| Date_registered |
| 1996-01-24 |
| Brief_description |
| An oxbow lake permanently connected to the Vaal River above the Vaalharts Weir, with extensive fringing reedbeds of Phragmites, Typha, etc., and adjacent flooded grass. Two summer and two winter counts are available, starting in summer 1996. The site holds a good variety of waterbird species, including Goliath and Squacco Herons, while Black Crake and Purple Gallinule occur in the reedbeds. The winter 1997 count of 2151 birds was more than twice that in 1996 and almost three times the summer 1997 total, and reflects peak numbers of waterfowl and Redknobbed Coot. Summer 1997 gave high counts of Glossy Ibis, Redbilled Teal, Ruff and Whiskered Tern. Numbers of Dabchick, and of most waterfowl, peak in winter, when Moorhen also seem to be considerably more numerous. A severe threat is infestation by alien water plants (Eichhornia, Myriophyllum aquaticum); other threats include reed encroachment resulting from nutrient enrichment from fertiliser runoff, and pollution by pesticides. |
| Spp | Common name | Taxonomic name | Min | Avg | Max | IBA | Subregional IBA | RAMSAR |
|---|---|---|---|---|---|---|---|---|
| 10015 | Anas hybrid | 1 | 1.00 | 1 | ||||
| 256 | Calidris pugnax | 1 | 49.67 | 407 | ||||
| 72 | Scopus umbretta | 2 | 3.50 | 5 | ||||
| 269 | Avocet, Pied | Recurvirostra avosetta | 4 | 4.00 | 4 | |||
| 212 | Coot, Red-knobbed | Fulica cristata | 2 | 440.14 | 1532 | |||
| 50 | Cormorant, Reed | Microcarbo africanus | 2 | 51.94 | 155 | |||
| 47 | Cormorant, White-breasted | Phalacrocorax lucidus | 1 | 3.91 | 14 | |||
| 202 | Crake, Baillon's | Zapornia pusilla | 5 | 5.00 | 5 | |||
| 203 | Crake, Black | Zapornia flavirostra | 1 | 5.43 | 10 | |||
| 52 | Darter, African | Anhinga rufa | 1 | 17.28 | 56 | |||
| 101 | Duck, Fulvous Whistling | Dendrocygna bicolor | 2 | 2.00 | 2 | |||
| 10014 | Duck, Unidentified | N/A N/A | 2 | 81.00 | 160 | |||
| 104 | Duck, White-backed | Thalassornis leuconotus | 2 | 2.00 | 2 | |||
| 100 | Duck, White-faced Whistling | Dendrocygna viduata | 2 | 6.56 | 16 | |||
| 96 | Duck, Yellow-billed | Anas undulata | 2 | 44.55 | 151 | |||
| 149 | Eagle, African Fish | Haliaeetus vocifer | 1 | 1.09 | 2 | |||
| 58 | Egret, Great | Ardea alba | 1 | 3.20 | 8 | |||
| 60 | Egret, Intermediate | Ardea intermedia | 1 | 9.75 | 32 | |||
| 59 | Egret, Little | Egretta garzetta | 1 | 13.92 | 63 | |||
| 61 | Egret, Western Cattle | Bubulcus ibis | 1 | 62.50 | 214 | |||
| 86 | Flamingo, Greater | Phoenicopterus roseus | 1 | 8.00 | 22 | |||
| 87 | Flamingo, Lesser | Phoeniconaias minor | 3 | 3.00 | 3 | |||
| 89 | Goose, Egyptian | Alopochen aegyptiaca | 2 | 39.73 | 293 | |||
| 88 | Goose, Spur-winged | Plectropterus gambensis | 1 | 145.00 | 1180 | 710 | ||
| 5 | Grebe, Black-necked | Podiceps nigricollis | 1 | 1.00 | 1 | |||
| 4 | Grebe, Great Crested | Podiceps cristatus | 1 | 7.40 | 23 | |||
| 6 | Grebe, Little | Tachybaptus ruficollis | 1 | 94.06 | 295 | 250 | ||
| 263 | Greenshank, Common | Tringa nebularia | 1 | 2.80 | 6 | |||
| 288 | Gull, Grey-headed | Chroicocephalus cirrocephalus | 1 | 6.67 | 17 | |||
| 167 | Harrier, African Marsh | Circus ranivorus | 1 | 1.00 | 1 | |||
| 64 | Heron, Black | Egretta ardesiaca | 1 | 5.36 | 17 | |||
| 55 | Heron, Black-headed | Ardea melanocephala | 1 | 1.00 | 1 | |||
| 56 | Heron, Goliath | Ardea goliath | 1 | 4.00 | 12 | |||
| 54 | Heron, Grey | Ardea cinerea | 1 | 3.64 | 22 | |||
| 57 | Heron, Purple | Ardea purpurea | 1 | 3.00 | 14 | |||
| 62 | Heron, Squacco | Ardeola ralloides | 2 | 24.39 | 135 | |||
| 10011 | Heron, Unidentified | N/A N/A | 48 | 48.00 | 48 | |||
| 81 | Ibis, African Sacred | Threskiornis aethiopicus | 1 | 18.80 | 78 | |||
| 83 | Ibis, Glossy | Plegadis falcinellus | 1 | 19.56 | 89 | |||
| 84 | Ibis, Hadada | Bostrychia hagedash | 1 | 12.74 | 65 | |||
| 228 | Jacana, African | Actophilornis africanus | 1 | 4.94 | 14 | |||
| 397 | Kingfisher, Malachite | Corythornis cristatus | 1 | 1.25 | 2 | |||
| 394 | Kingfisher, Pied | Ceryle rudis | 1 | 1.71 | 4 | |||
| 245 | Lapwing, Blacksmith | Vanellus armatus | 2 | 17.55 | 60 | |||
| 509 | Martin, Brown-throated | Riparia paludicola | 1 | 1.00 | 1 | |||
| 210 | Moorhen, Common | Gallinula chloropus | 1 | 51.14 | 175 | |||
| 172 | Osprey, Western | Pandion haliaetus | 1 | 1.00 | 1 | |||
| 41 | Pelican, Pink-backed | Pelecanus rufescens | 1 | 1.00 | 1 | |||
| 233 | Plover, Common Ringed | Charadrius hiaticula | 1 | 1.00 | 1 | |||
| 237 | Plover, Kittlitz's | Charadrius pecuarius | 1 | 12.00 | 57 | |||
| 238 | Plover, Three-banded | Charadrius tricollaris | 1 | 4.13 | 11 | |||
| 102 | Pochard, Southern | Netta erythrophthalma | 4 | 4.00 | 4 | |||
| 282 | Pratincole, Black-winged | Glareola nordmanni | 1 | 1.00 | 1 | |||
| 197 | Rail, African | Rallus caerulescens | 1 | 1.50 | 2 | -1 | ||
| 258 | Sandpiper, Common | Actitis hypoleucos | 1 | 1.00 | 1 | |||
| 251 | Sandpiper, Curlew | Calidris ferruginea | 1 | 2.25 | 4 | |||
| 262 | Sandpiper, Marsh | Tringa stagnatilis | 1 | 3.45 | 11 | |||
| 264 | Sandpiper, Wood | Tringa glareola | 1 | 6.92 | 16 | |||
| 90 | Shelduck, South African | Tadorna cana | 2 | 6.38 | 15 | |||
| 94 | Shoveler, Cape | Spatula smithii | 1 | 6.57 | 20 | |||
| 250 | Snipe, African | Gallinago nigripennis | 1 | 7.00 | 18 | |||
| 85 | Spoonbill, African | Platalea alba | 1 | 4.75 | 12 | |||
| 270 | Stilt, Black-winged | Himantopus himantopus | 1 | 8.73 | 24 | |||
| 253 | Stint, Little | Calidris minuta | 1 | 24.56 | 160 | |||
| 76 | Stork, Yellow-billed | Mycteria ibis | 1 | 1.00 | 1 | |||
| 208 | Swamphen, African | Porphyrio madagascariensis | 1 | 3.14 | 10 | |||
| 99 | Teal, Blue-billed | Spatula hottentota | 1 | 4.36 | 23 | |||
| 98 | Teal, Cape | Anas capensis | 1 | 5.80 | 16 | |||
| 97 | Teal, Red-billed | Anas erythrorhyncha | 2 | 21.28 | 85 | |||
| 290 | Tern, Caspian | Hydroprogne caspia | 1 | 1.80 | 3 | |||
| 305 | Tern, Whiskered | Chlidonias hybrida | 1 | 14.89 | 47 | |||
| 304 | Tern, White-winged | Chlidonias leucopterus | 1 | 83.42 | 299 | |||
| 10008 | Wader, Unidentified | N/A N/A | 1 | 2.00 | 3 | |||
| 685 | Wagtail, African Pied | Motacilla aguimp | 1 | 1.00 | 1 | |||
| 686 | Wagtail, Cape | Motacilla capensis | 1 | 9.67 | 40 | |||
| 689 | Wagtail, Western Yellow | Motacilla flava | 5 | 5.00 | 5 |
Tuesday 23 April 2024 05:08
FitzPatrick Institute of African Ornithology
Department
of Biological Sciences - University of Cape Town
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