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Zandvlei: Upper Estuary (34061828)

Western Cape

Authority City of Cape Town Biodiversity Management Branch & Private
Conservation status PARTLY PROTECTED
IBA information
Ramsar information
Heritage information
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An open estuary, with some reedbeds and other emergent vegetation. Holds a good variety of birds, including Purple Heron, Little Bittern and Purple Gallinule. Cormorant counts peak in winter; numbers of Darter, Cape Teal, Redknobbed Coot, Blackwinged Stilt and Hartlaub's Gull show no definite seasonal peak. There were unusually large counts of Blacksmith Plover in summer 1993, of Cape Shoveller in the 1994-1996 summers, of Sacred Ibis in summer 1994, and of Egyptian Goose in winter 1997. Numbers of Darter show some overall increase but Cape Teal appear to be declining. Severe threats are posed by invasive alien plants (Paspalum grass and Eichhornia); important threats include eutrophication, and pollution by solid waste. Hunting, fishing, domestic dogs and cats, and residential development, are also problems. Mallard pose some hybridization threat. The site covers the pans in the Zandvlei Nature Reserve and the upper parts of the estuary down to the Sea Scout base.

SppCommon nameTaxonomic nameMinAvgMaxIBASubregional
269Avocet, PiedRecurvirostra avosetta141.69180 125
67Bittern, LittleIxobrychus minutus11.403   
212Coot, Red-knobbedFulica cristata7411.213073 2500 
48Cormorant, CapePhalacrocorax capensis128.44156   
50Cormorant, ReedPhalacrocorax africanus226.14149   
47Cormorant, White-breastedPhalacrocorax carbo112.60146  130
52Darter, AfricanAnhinga rufa222.0097   
95Duck, African BlackAnas sparsa22.002   
10006Duck, DomesticAnas platyrhynchos114.5361
10005Duck, HybridAnas hybrid29.6723
10015Duck, Hybrid MallardAnas hybrid139.69156
103Duck, MaccoaOxyura maccoa66.006   
1016Duck, MallardAnas platyrhynchos19.7356
1017Duck, MandarinAix galericulata11.001
10014Duck, UnidentifiedN/A N/A16.8323
104Duck, White-backedThalassornis leuconotus736.1496   
100Duck, White-facedDendrocygna viduata913.3316   
96Duck, Yellow-billedAnas undulata118.03153   
61Egret, CattleBubulcus ibis12.9020   
59Egret, LittleEgretta garzetta14.9818   
982Egret, SlatyEgretta vinaceigula11.001   
60Egret, Yellow-billedEgretta intermedia12.1315   
149Fish-eagle, AfricanHaliaeetus vocifer11.453
86Flamingo, GreaterPhoenicopterus ruber637.3396   
87Flamingo, LesserPhoenicopterus minor66.507   
44Gannet, CapeMorus capensis11.001
89Goose, EgyptianAlopochen aegyptiacus141.691121   
88Goose, Spur-wingedPlectropterus gambensis19.0360   
5Grebe, Black-neckedPodiceps nigricollis68.0010   
4Grebe, Great CrestedPodiceps cristatus210.2644 25 
6Grebe, LittleTachybaptus ruficollis111.2851   
263Greenshank, CommonTringa nebularia11.272   
288Gull, Grey-headedLarus cirrocephalus13.369   
289Gull, Hartlaub'sLarus hartlaubii136.25183 125 
287Gull, KelpLarus dominicanus112.22146   
55Heron, Black-headedArdea melanocephala11.323   
54Heron, GreyArdea cinerea13.1115   
57Heron, PurpleArdea purpurea11.915   
62Heron, SquaccoArdeola ralloides11.001   
10011Heron, UnidentifiedN/A N/A11.001
81Ibis, African SacredThreskiornis aethiopicus18.2281   
83Ibis, GlossyPlegadis falcinellus13.448   
84Ibis, HadedaBostrychia hagedash14.4513   
228Jacana, AfricanActophilornis africanus11.001  
395Kingfisher, GiantMegaceryle maximus11.242
397Kingfisher, MalachiteAlcedo cristata11.856
394Kingfisher, PiedCeryle rudis16.8019
245Lapwing, BlacksmithVanellus armatus111.84112   
167Marsh-harrier, AfricanCircus ranivorus11.212
509Martin, Brown-throatedRiparia paludicola11.001
210Moorhen, CommonGallinula chloropus111.7154   
69Night-Heron, Black-crownedNycticorax nycticorax16.8631  
230Painted-snipe, GreaterRostratula benghalensis11.001  
42Pelican, Great WhitePelecanus onocrotalus15.9517   
241Plover, GreyPluvialis squatarola11.001   
237Plover, Kittlitz'sCharadrius pecuarius11.001   
238Plover, Three-bandedCharadrius tricollaris12.697   
102Pochard, SouthernNetta erythrophthalma11.752   
258Sandpiper, CommonActitis hypoleucos11.332  
262Sandpiper, MarshTringa stagnatilis11.502   
264Sandpiper, WoodTringa glareola11.252   
90Shelduck, South AfricanTadorna cana22.002   
94Shoveler, CapeAnas smithii19.4849   
85Spoonbill, AfricanPlatalea alba14.0831   
270Stilt, Black-wingedHimantopus himantopus113.7344  
78Stork, Abdim'sCiconia abdimii1919.0019   
76Stork, Yellow-billedMycteria ibis11.001   
208Swamphen, African PurplePorphyrio madagascariensis11.945  
10007Swan, Black Cygnus atratus11.001
884Swan, MuteCygnus olor22.002
98Teal, CapeAnas capensis111.7640   
97Teal, Red-billedAnas erythrorhyncha13.458   
290Tern, CaspianSterna caspia13.9216   
291Tern, CommonSterna hirundo13.409   
296Tern, SandwichSterna sandvicensis11.001   
298Tern, SwiftSterna bergii12.204   
10009Tern, UnidentifiedN/A N/A44.004
305Tern, WhiskeredChlidonias hybrida11.803   
304Tern, White-wingedChlidonias leucopterus13.6711   
274Thick-knee, WaterBurhinus vermiculatus12.757   
10008Wader, UnidentifiedN/A N/A11.001
686Wagtail, CapeMotacilla capensis15.0018
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Saturday 23 September 2017 02:11
© Animal Demography Unit 2015
Department of Biological Sciences - University of Cape Town

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