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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 cristata168.21317   
50Cormorant, ReedPhalacrocorax africanus116.5052   
47Cormorant, White-breastedPhalacrocorax carbo14.2425   
203Crake, BlackAmaurornis flavirostris15.4424
52Darter, AfricanAnhinga rufa17.3923   
95Duck, African BlackAnas sparsa12.114   
91Duck, CombSarkidiornis melanotos33.003   
101Duck, FulvousDendrocygna bicolor112.3288   
103Duck, MaccoaOxyura maccoa22.002   
1016Duck, MallardAnas platyrhynchos11.172
10014Duck, UnidentifiedN/A N/A18.1714
104Duck, White-backedThalassornis leuconotus33.003   
100Duck, White-facedDendrocygna viduata153.25386   
96Duck, Yellow-billedAnas undulata226.18141   
61Egret, CattleBubulcus ibis170.79617   
58Egret, GreatEgretta alba12.004   
59Egret, LittleEgretta garzetta18.0057   
60Egret, Yellow-billedEgretta intermedia13.209   
149Fish-eagle, AfricanHaliaeetus vocifer11.001
86Flamingo, GreaterPhoenicopterus ruber69.0012   
87Flamingo, LesserPhoenicopterus minor610.0014   
205Flufftail, Red-chestedSarothrura rufa11.001
89Goose, EgyptianAlopochen aegyptiacus727.42118   
88Goose, Spur-wingedPlectropterus gambensis115.79154   
4Grebe, Great CrestedPodiceps cristatus11.001   
6Grebe, LittleTachybaptus ruficollis16.9623   
263Greenshank, CommonTringa nebularia11.332   
288Gull, Grey-headedLarus cirrocephalus116.0776   
72Hamerkop, HamerkopScopus umbretta11.672   
64Heron, BlackEgretta ardesiaca14.3913   
55Heron, Black-headedArdea melanocephala13.2910   
56Heron, GoliathArdea goliath13.078   
63Heron, Green-backedButorides striata11.753   
54Heron, GreyArdea cinerea13.6013   
57Heron, PurpleArdea purpurea12.9212   
62Heron, SquaccoArdeola ralloides19.8727   
81Ibis, African SacredThreskiornis aethiopicus122.3958   
83Ibis, GlossyPlegadis falcinellus180.23481   
84Ibis, HadedaBostrychia hagedash110.5450   
228Jacana, AfricanActophilornis africanus16.1517  
395Kingfisher, GiantMegaceryle maximus11.202
397Kingfisher, MalachiteAlcedo cristata12.225
394Kingfisher, PiedCeryle rudis13.168
245Lapwing, BlacksmithVanellus armatus216.2136   
167Marsh-harrier, AfricanCircus ranivorus11.602
509Martin, Brown-throatedRiparia paludicola11.001
210Moorhen, CommonGallinula chloropus422.8257   
69Night-Heron, Black-crownedNycticorax nycticorax15.0928  
233Plover, Common RingedCharadrius hiaticula11.001   
238Plover, Three-bandedCharadrius tricollaris13.268   
102Pochard, SouthernNetta erythrophthalma23.8614   
197Rail, AfricanRallus caerulescens12.258
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 smithii25.208   
250Snipe, AfricanGallinago nigripennis12.479   
85Spoonbill, AfricanPlatalea alba12.938   
270Stilt, Black-wingedHimantopus himantopus12.608  
253Stint, LittleCalidris minuta22.503   
76Stork, Yellow-billedMycteria ibis11.001   
208Swamphen, African PurplePorphyrio madagascariensis15.7714  
98Teal, CapeAnas capensis23.675   
99Teal, HottentotAnas hottentota215.8438   
97Teal, Red-billedAnas erythrorhyncha213.91180   
305Tern, WhiskeredChlidonias hybrida124.6419815075100
304Tern, White-wingedChlidonias leucopterus13.3311   
686Wagtail, CapeMotacilla capensis16.9521
689Wagtail, YellowMotacilla flava11.001
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Friday 24 November 2017 06:43
© Animal Demography Unit 2015
Department of Biological Sciences - University of Cape Town

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