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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
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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.

SppCommon nameTaxonomic nameMinAvgMaxIBASubregional
IBA
RAMSAR
269Avocet, PiedRecurvirostra avosetta44.004  
212Coot, Red-knobbedFulica cristata2440.141532   
50Cormorant, ReedPhalacrocorax africanus251.94155   
47Cormorant, White-breastedPhalacrocorax carbo13.9114   
202Crake, Baillon'sPorzana pusilla55.005
203Crake, BlackAmaurornis flavirostris15.4310
52Darter, AfricanAnhinga rufa117.2856   
101Duck, FulvousDendrocygna bicolor22.002   
10015Duck, Hybrid MallardAnas hybrid11.001
10014Duck, UnidentifiedN/A N/A281.00160
104Duck, White-backedThalassornis leuconotus22.002   
100Duck, White-facedDendrocygna viduata26.5616   
96Duck, Yellow-billedAnas undulata244.55151   
61Egret, CattleBubulcus ibis162.50214   
58Egret, GreatEgretta alba13.208   
59Egret, LittleEgretta garzetta113.9263   
60Egret, Yellow-billedEgretta intermedia19.7532   
149Fish-eagle, AfricanHaliaeetus vocifer11.092
86Flamingo, GreaterPhoenicopterus ruber18.0022   
87Flamingo, LesserPhoenicopterus minor33.003   
89Goose, EgyptianAlopochen aegyptiacus239.73293   
88Goose, Spur-wingedPlectropterus gambensis1145.001180  750
5Grebe, Black-neckedPodiceps nigricollis11.001   
4Grebe, Great CrestedPodiceps cristatus17.4023   
6Grebe, LittleTachybaptus ruficollis194.06295 250 
263Greenshank, CommonTringa nebularia12.806   
288Gull, Grey-headedLarus cirrocephalus16.6717   
72Hamerkop, HamerkopScopus umbretta23.505   
64Heron, BlackEgretta ardesiaca15.3617   
55Heron, Black-headedArdea melanocephala11.001   
56Heron, GoliathArdea goliath14.0012   
54Heron, GreyArdea cinerea13.6422   
57Heron, PurpleArdea purpurea13.0014   
62Heron, SquaccoArdeola ralloides224.39135   
10011Heron, UnidentifiedN/A N/A4848.0048
81Ibis, African SacredThreskiornis aethiopicus118.8078   
83Ibis, GlossyPlegadis falcinellus119.5689   
84Ibis, HadedaBostrychia hagedash112.7465   
228Jacana, AfricanActophilornis africanus14.9414  
397Kingfisher, MalachiteAlcedo cristata11.252
394Kingfisher, PiedCeryle rudis11.714
245Lapwing, BlacksmithVanellus armatus217.5560   
167Marsh-harrier, AfricanCircus ranivorus11.001
509Martin, Brown-throatedRiparia paludicola11.001
210Moorhen, CommonGallinula chloropus151.14175   
172Osprey, OspreyPandion haliaetus11.001
41Pelican, Pink-backedPelecanus rufescens11.001   
233Plover, Common RingedCharadrius hiaticula11.001   
237Plover, Kittlitz'sCharadrius pecuarius112.0057   
238Plover, Three-bandedCharadrius tricollaris14.1311   
102Pochard, SouthernNetta erythrophthalma44.004   
282Pratincole, Black-wingedGlareola nordmanni11.001   
197Rail, AfricanRallus caerulescens11.502
256Ruff, RuffPhilomachus pugnax149.67407  
258Sandpiper, CommonActitis hypoleucos11.001  
251Sandpiper, CurlewCalidris ferruginea12.254  
262Sandpiper, MarshTringa stagnatilis13.4511   
264Sandpiper, WoodTringa glareola16.9216   
90Shelduck, South AfricanTadorna cana26.3815   
94Shoveler, CapeAnas smithii16.5720   
250Snipe, AfricanGallinago nigripennis17.0018   
85Spoonbill, AfricanPlatalea alba14.7512   
270Stilt, Black-wingedHimantopus himantopus18.7324  
253Stint, LittleCalidris minuta124.56160   
76Stork, Yellow-billedMycteria ibis11.001   
208Swamphen, African PurplePorphyrio madagascariensis13.1410  
98Teal, CapeAnas capensis15.8016   
99Teal, HottentotAnas hottentota14.3623   
97Teal, Red-billedAnas erythrorhyncha221.2885   
292Tern, AntarcticSterna vittata00.000   
290Tern, CaspianSterna caspia11.803   
305Tern, WhiskeredChlidonias hybrida114.8947   
304Tern, White-wingedChlidonias leucopterus183.42299   
10008Wader, UnidentifiedN/A N/A12.003
685Wagtail, African PiedMotacilla aguimp11.001
686Wagtail, CapeMotacilla capensis19.6740
689Wagtail, YellowMotacilla flava55.005
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Friday 24 November 2017 05:03
© Animal Demography Unit 2015
Department of Biological Sciences - University of Cape Town

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