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Grootvaly on Blesbok (26162830)

Gauteng

CWAC status REGISTERED-COUNTED REGULARLY
Authority Private
Management status UNKNOWN
Conservation status UNPROTECTED
IBA information SA021 - BLESBOKSPRUIT
Ramsar information
Heritage information
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Information 

Date_registered
1994-07-17
Brief_description
Part of the Blesbokspruit system, with open water, reedbeds and marshy habitat. Supports a wide variety of waterbirds, usually in small to moderate numbers, but the winter 1994 count was relatively high, with maximum counts of Glossy Ibis, Egyptian and Spurwinged Geese, Yellowbilled Duck and Redbilled Teal. Number of species, total count and total biomass all show a decline during the survey period; winter counts of Greyheaded Gull, Purple Gallinule and several waterfowl are declining, while winter Glossy Ibis numbers crashed after 1994. In contrast, winter numbers of Sacred Ibis are increasing. Egrets, Squacco Heron and Black- crowned Night Heron occur predominantly in summer. Blesbokspruit is severely threatened by discharge of mine water which drastically increases total water volume, maintains artificially high water levels in the dry season, and contains many pollutants, including salt.

SppCommon nameTaxonomic nameMinAvgMaxIBASubregional
IBA
RAMSAR
72, HamerkopScopus umbretta11.672   
1016, MallardAnas platyrhynchos11.172
256, RuffCalidris pugnax14.8916  
269Avocet, PiedRecurvirostra avosetta12.334   
71Bittern, EurasianBotaurus stellaris11.001   
67Bittern, LittleIxobrychus minutus11.414   
212Coot, Red-knobbedFulica cristata159.45317   
50Cormorant, ReedMicrocarbo africanus113.6752   
47Cormorant, White-breastedPhalacrocorax lucidus14.0025   
203Crake, BlackZaporina flavirostra15.3124
52Darter, AfricanAnhinga rufa15.7723   
95Duck, African BlackAnas sparsa12.387   
101Duck, Fulvous WhistlingDendrocygna bicolor112.1388   
91Duck, Knob-billedSarkidiornis melanotos33.003   
103Duck, MaccoaOxyura maccoa22.002   
10014Duck, UnidentifiedAnas sp.18.1714
104Duck, White-backedThalassornis leuconotus33.003   
100Duck, White-faced WhistlingDendrocygna viduata144.18386   
96Duck, Yellow-billedAnas undulata223.35141   
58Egret, GreatArdea alba12.004   
60Egret, IntermediateArdea intermedia14.0913   
59Egret, LittleEgretta garzetta17.0657   
61Egret, Western CattleBubulcus ibis160.76617   
149Fish Eagle, AfricanHaliaeetus vocifer11.001
86Flamingo, GreaterPhoenicopterus roseus47.4012   
87Flamingo, LesserPhoeniconaias minor27.3314   
205Flufftail, Red-chestedSarothrura rufa11.001
92Goose, African Pygmy Nettapus auritus11.001   
89Goose, EgyptianAlopochen aegyptiaca729.27118   
88Goose, Spur-wingedPlectropterus gambensis114.83154   
4Grebe, Great CrestedPodiceps cristatus11.001   
6Grebe, LittleTachybaptus ruficollis16.8223   
263Greenshank, CommonTringa nebularia11.332   
288Gull, Grey-headedChroicocephalus cirrocephalus113.9176   
167Harrier, African MarshCircus ranivorus11.252
169Harrier, BlackCircus maurus11.001
166Harrier, Western MarshCircus aeruginosus11.001
64Heron, BlackEgretta ardesiaca13.5813   
55Heron, Black-headedArdea melanocephala13.1810   
56Heron, GoliathArdea goliath12.718   
54Heron, GreyArdea cinerea13.4013   
57Heron, PurpleArdea purpurea12.7212   
62Heron, SquaccoArdeola ralloides17.9327   
63Heron, StriatedButorides striata11.603   
81Ibis, African SacredThreskiornis aethiopicus125.2489   
83Ibis, GlossyPlegadis falcinellus1123.1110151000500 
84Ibis, HadadaBostrychia hagedash19.6450   
228Jacana, AfricanActophilornis africanus15.5217   
395Kingfisher, GiantMegaceryle maxima11.172
397Kingfisher, MalachiteCorythornis cristatus12.055
394Kingfisher, PiedCeryle rudis12.808
247Lapwing, African WattledVanellus senegallus22.002   
245Lapwing, BlacksmithVanellus armatus214.8836   
509Martin, Brown-throatedRiparia paludicola11.001
210Moorhen, CommonGallinula chloropus428.68126   
69Night Heron, Black-crownedNycticorax nycticorax14.2128   
233Plover, Common RingedCharadrius hiaticula11.001   
238Plover, Three-bandedCharadrius tricollaris13.198   
102Pochard, SouthernNetta erythrophthalma14.9224   
197Rail, AfricanRallus caerulescens12.228-1
258Sandpiper, CommonActitis hypoleucos11.806  
251Sandpiper, CurlewCalidris ferruginea11.001  
262Sandpiper, MarshTringa stagnatilis11.001   
264Sandpiper, WoodTringa glareola13.178   
90Shelduck, South AfricanTadorna cana12.003   
94Shoveler, CapeAnas smithii24.868   
250Snipe, AfricanGallinago nigripennis12.339   
85Spoonbill, AfricanPlatalea alba12.828   
270Stilt, Black-wingedHimantopus himantopus12.828   
253Stint, LittleCalidris minuta22.503   
76Stork, Yellow-billedMycteria ibis11.001   
208Swamphen, AfricanPorphyrio madagascariensis15.0614  
99Teal, Blue-billedAnas hottentota113.8438   
98Teal, CapeAnas capensis23.675   
97Teal, Red-billedAnas erythrorhyncha111.11180   
305Tern, WhiskeredChlidonias hybrida119.481981507585
304Tern, White-wingedChlidonias leucopterus13.0011   
274Thick-knee, WaterBurhinus vermiculatus44.004   
686Wagtail, CapeMotacilla capensis15.8921
689Wagtail, Western YellowMotacilla flava11.001
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Monday 09 December 2024 05:18
FitzPatrick Institute of African Ornithology
Department of Biological Sciences - University of Cape Town

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