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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
1016Anas platyrhynchos11.172
256Calidris pugnax14.8916  
72Scopus umbretta11.672   
269Avocet, PiedRecurvirostra avosetta11.001   
71Bittern, EurasianBotaurus stellaris11.001   
67Bittern, LittleIxobrychus minutus11.444   
212Coot, Red-knobbedFulica cristata160.60317   
50Cormorant, ReedMicrocarbo africanus114.3352   
47Cormorant, White-breasted Phalacrocorax lucidus14.0925   
203Crake, BlackZapornia flavirostra15.2824
52Darter, AfricanAnhinga rufa16.0023   
95Duck, African BlackAnas sparsa12.277   
101Duck, Fulvous WhistlingDendrocygna bicolor112.3288   
91Duck, Knob-billedSarkidiornis melanotos33.003   
103Duck, MaccoaOxyura maccoa22.002   
10014Duck, UnidentifiedN/A N/A18.1714
104Duck, White-backedThalassornis leuconotus33.003   
100Duck, White-faced WhistlingDendrocygna viduata147.25386   
96Duck, Yellow-billedAnas undulata223.67141   
149Eagle, African FishHaliaeetus vocifer11.001
58Egret, GreatArdea alba12.004   
60Egret, IntermediateArdea intermedia14.0913   
59Egret, LittleEgretta garzetta17.4457   
61Egret, Western CattleBubulcus ibis164.48617   
86Flamingo, Greater Phoenicopterus roseus47.4012   
87Flamingo, LesserPhoeniconaias minor27.3314   
205Flufftail, Red-chestedSarothrura rufa11.001
92Goose, African PygmyNettapus auritus11.001   
89Goose, EgyptianAlopochen aegyptiaca728.75118   
88Goose, Spur-wingedPlectropterus gambensis115.70154   
4Grebe, Great CrestedPodiceps cristatus11.001   
6Grebe, LittleTachybaptus ruficollis16.9223   
263Greenshank, CommonTringa nebularia11.332   
288Gull, Grey-headedChroicocephalus cirrocephalus114.2976   
167Harrier, African MarshCircus ranivorus11.302
169Harrier, BlackCircus maurus11.001
166Harrier, Western MarshCircus aeruginosus11.001
64Heron, BlackEgretta ardesiaca13.8213   
69Heron, Black-crowned NightNycticorax nycticorax14.2128   
55Heron, Black-headedArdea melanocephala13.1810   
56Heron, GoliathArdea goliath12.798   
54Heron, GreyArdea cinerea13.3613   
57Heron, PurpleArdea purpurea12.7212   
62Heron, SquaccoArdeola ralloides18.2627   
63Heron, StriatedButorides striata11.753   
81Ibis, African SacredThreskiornis aethiopicus123.0778   
83Ibis, GlossyPlegadis falcinellus1129.8110151000500 
84Ibis, Hadada Bostrychia hagedash110.0050   
228Jacana, AfricanActophilornis africanus15.5217   
395Kingfisher, GiantMegaceryle maxima11.202
397Kingfisher, MalachiteCorythornis cristatus12.165
394Kingfisher, PiedCeryle rudis12.928
247Lapwing, African WattledVanellus senegallus22.002   
245Lapwing, BlacksmithVanellus armatus214.9436   
509Martin, Brown-throatedRiparia paludicola11.001
210Moorhen, CommonGallinula chloropus427.19101   
233Plover, Common RingedCharadrius hiaticula11.001   
238Plover, Three-bandedCharadrius tricollaris13.268   
102Pochard, SouthernNetta erythrophthalma14.9224   
197Rail, AfricanRallus caerulescens12.228-1
258Sandpiper, CommonActitis hypoleucos11.806  
251Sandpiper, CurlewCalidris ferruginea11.001  
262Sandpiper, MarshTringa stagnatilis11.001   
264Sandpiper, WoodTringa glareola13.278   
90Shelduck, South AfricanTadorna cana12.003   
94Shoveler, CapeSpatula smithii25.088   
250Snipe, AfricanGallinago nigripennis12.339   
85Spoonbill, AfricanPlatalea alba12.828   
270Stilt, Black-wingedHimantopus himantopus12.828   
253Stint, LittleCalidris minuta22.503   
76Stork, Yellow-billedMycteria ibis11.001   
208Swamphen, AfricanPorphyrio madagascariensis15.0014  
99Teal, Blue-billedSpatula hottentota114.2038   
98Teal, CapeAnas capensis23.675   
97Teal, Red-billedAnas erythrorhyncha111.18180   
305Tern, WhiskeredChlidonias hybrida120.741981507585
304Tern, White-wingedChlidonias leucopterus13.0011   
274Thick-knee, WaterBurhinus vermiculatus44.004   
686Wagtail, CapeMotacilla capensis15.9421
689Wagtail, Western YellowMotacilla flava11.001
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Wednesday 01 February 2023 10:37
FitzPatrick Institute of African Ornithology
Department of Biological Sciences - University of Cape Town

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