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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
269Avocet, PiedRecurvirostra avosetta11.001  
71Bittern, EurasianBotaurus stellaris11.001   
67Bittern, LittleIxobrychus minutus11.444   
212Coot, Red-knobbedFulica cristata163.06317   
50Cormorant, ReedPhalacrocorax africanus115.4652   
47Cormorant, White-breastedPhalacrocorax carbo14.0925   
203Crake, BlackAmaurornis flavirostris15.0524
52Darter, AfricanAnhinga rufa16.4123   
95Duck, African BlackAnas sparsa12.367   
101Duck, FulvousDendrocygna bicolor112.3288   
91Duck, Knob-billedSarkidiornis melanotos33.003   
103Duck, MaccoaOxyura maccoa22.002   
1016Duck, MallardAnas platyrhynchos11.172
10014Duck, UnidentifiedN/A N/A18.1714
104Duck, White-backedThalassornis leuconotus33.003   
100Duck, White-facedDendrocygna viduata151.42386   
96Duck, Yellow-billedAnas undulata224.55141   
61Egret, CattleBubulcus ibis163.83617   
58Egret, GreatEgretta alba12.004   
59Egret, LittleEgretta garzetta17.8757   
60Egret, Yellow-billedEgretta intermedia13.209   
149Fish-eagle, AfricanHaliaeetus vocifer11.001
86Flamingo, GreaterPhoenicopterus ruber47.4012   
87Flamingo, LesserPhoenicopterus minor27.3314   
205Flufftail, Red-chestedSarothrura rufa11.001
89Goose, EgyptianAlopochen aegyptiacus729.10118   
88Goose, Spur-wingedPlectropterus gambensis115.08154   
4Grebe, Great CrestedPodiceps cristatus11.001   
6Grebe, LittleTachybaptus ruficollis16.7923   
263Greenshank, CommonTringa nebularia11.332   
288Gull, Grey-headedLarus cirrocephalus115.5476   
72Hamerkop, HamerkopScopus umbretta11.672   
169Harrier, BlackCircus maurus11.001
64Heron, BlackEgretta ardesiaca14.1013   
55Heron, Black-headedArdea melanocephala13.1810   
56Heron, GoliathArdea goliath12.848   
63Heron, Green-backedButorides striata11.753   
54Heron, GreyArdea cinerea13.4713   
57Heron, PurpleArdea purpurea12.8112   
62Heron, SquaccoArdeola ralloides18.3927   
81Ibis, African SacredThreskiornis aethiopicus120.9758   
83Ibis, GlossyPlegadis falcinellus1106.7110151000500 
84Ibis, HadedaBostrychia hagedash110.0050   
228Jacana, AfricanActophilornis africanus15.5217  
395Kingfisher, GiantMegaceryle maximus11.202
397Kingfisher, MalachiteAlcedo cristata12.165
394Kingfisher, PiedCeryle rudis12.868
247Lapwing, African WattledVanellus senegallus22.002   
245Lapwing, BlacksmithVanellus armatus214.9436   
167Marsh-harrier, AfricanCircus ranivorus11.332
166Marsh-harrier, WesternCircus aeruginosus11.001
509Martin, Brown-throatedRiparia paludicola11.001
210Moorhen, CommonGallinula chloropus425.9464   
69Night-Heron, Black-crownedNycticorax nycticorax14.4628  
233Plover, Common RingedCharadrius hiaticula11.001   
238Plover, Three-bandedCharadrius tricollaris13.148   
102Pochard, SouthernNetta erythrophthalma14.9224   
92Pygmy-Goose, AfricanNettapus auritus11.001   
197Rail, AfricanRallus caerulescens12.228
256Ruff, RuffPhilomachus pugnax14.8916  
258Sandpiper, CommonActitis hypoleucos11.806  
251Sandpiper, CurlewCalidris ferruginea11.001  
262Sandpiper, MarshTringa stagnatilis11.001   
264Sandpiper, WoodTringa glareola13.278   
90Shelduck, South AfricanTadorna cana12.003   
94Shoveler, CapeAnas smithii25.088   
250Snipe, AfricanGallinago nigripennis12.339   
85Spoonbill, AfricanPlatalea alba12.828   
270Stilt, Black-wingedHimantopus himantopus12.608  
253Stint, LittleCalidris minuta22.503   
76Stork, Yellow-billedMycteria ibis11.001   
208Swamphen, African PurplePorphyrio madagascariensis15.2614  
98Teal, CapeAnas capensis23.675   
99Teal, HottentotAnas hottentota214.7238   
97Teal, Red-billedAnas erythrorhyncha111.71180   
305Tern, WhiskeredChlidonias hybrida120.7419815075100
304Tern, White-wingedChlidonias leucopterus13.0011   
274Thick-knee, WaterBurhinus vermiculatus44.004   
686Wagtail, CapeMotacilla capensis16.2621
689Wagtail, YellowMotacilla flava11.001
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Tuesday 01 December 2020 10:43
FitzPatrick Institute of African Ornithology
Department of Biological Sciences - University of Cape Town

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