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Zandvlei: Upper Estuary (34061828)

Western Cape

CWAC status REGISTERED-COUNTED REGULARLY
Authority City of Cape Town Biodiversity Management Branch & Private
Management status TOWN COUNCIL PROPERTY
Conservation status PARTLY PROTECTED
IBA information
Ramsar information
Heritage information
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Information 

Date_registered
1993-01-09
Brief_description
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
IBA
RAMSAR
269Avocet, PiedRecurvirostra avosetta140.48180 125
67Bittern, LittleIxobrychus minutus11.403   
212Coot, Red-knobbedFulica cristata7412.493073 2500 
48Cormorant, CapePhalacrocorax capensis128.46156   
50Cormorant, ReedPhalacrocorax africanus227.24149   
47Cormorant, White-breastedPhalacrocorax carbo112.49146  130
52Darter, AfricanAnhinga rufa222.2897   
95Duck, African BlackAnas sparsa22.002   
10006Duck, DomesticAnas platyrhynchos114.5361
10005Duck, HybridAnas hybrid29.6723
10015Duck, Hybrid MallardAnas hybrid139.08156
103Duck, MaccoaOxyura maccoa66.006   
1016Duck, MallardAnas platyrhynchos19.6756
1017Duck, MandarinAix galericulata11.001
10014Duck, UnidentifiedN/A N/A16.1423
104Duck, White-backedThalassornis leuconotus736.1496   
100Duck, White-facedDendrocygna viduata913.3316   
96Duck, Yellow-billedAnas undulata118.73153   
61Egret, CattleBubulcus ibis12.9020   
59Egret, LittleEgretta garzetta15.0818   
982Egret, SlatyEgretta vinaceigula11.001   
60Egret, Yellow-billedEgretta intermedia12.0815   
149Fish-eagle, AfricanHaliaeetus vocifer11.453
86Flamingo, GreaterPhoenicopterus ruber637.3396   
87Flamingo, LesserPhoenicopterus minor66.507   
44Gannet, CapeMorus capensis11.001
89Goose, EgyptianAlopochen aegyptiacus141.841121   
88Goose, Spur-wingedPlectropterus gambensis18.7960   
5Grebe, Black-neckedPodiceps nigricollis68.0010   
4Grebe, Great CrestedPodiceps cristatus210.2844 25 
6Grebe, LittleTachybaptus ruficollis111.1351   
263Greenshank, CommonTringa nebularia11.272   
288Gull, Grey-headedLarus cirrocephalus13.759   
289Gull, Hartlaub'sLarus hartlaubii137.76183 125 
287Gull, KelpLarus dominicanus112.71146   
55Heron, Black-headedArdea melanocephala11.323   
54Heron, GreyArdea cinerea13.0915   
57Heron, PurpleArdea purpurea11.915   
62Heron, SquaccoArdeola ralloides11.001   
10011Heron, UnidentifiedN/A N/A11.001
81Ibis, African SacredThreskiornis aethiopicus18.1381   
83Ibis, GlossyPlegadis falcinellus13.388   
84Ibis, HadedaBostrychia hagedash14.5113   
228Jacana, AfricanActophilornis africanus11.001  
395Kingfisher, GiantMegaceryle maximus11.242
397Kingfisher, MalachiteAlcedo cristata11.916
394Kingfisher, PiedCeryle rudis16.9519
245Lapwing, BlacksmithVanellus armatus111.81112   
167Marsh-harrier, AfricanCircus ranivorus11.212
509Martin, Brown-throatedRiparia paludicola11.001
210Moorhen, CommonGallinula chloropus111.7654   
69Night-Heron, Black-crownedNycticorax nycticorax16.7631  
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 himantopus113.5844  
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 capensis111.6240   
97Teal, Red-billedAnas erythrorhyncha13.458   
290Tern, CaspianSterna caspia13.9616   
291Tern, CommonSterna hirundo13.329   
296Tern, SandwichSterna sandvicensis11.001   
298Tern, SwiftSterna bergii12.204   
10009Tern, UnidentifiedN/A N/A44.004
305Tern, WhiskeredChlidonias hybrida11.673   
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 18 November 2017 04:57
© Animal Demography Unit 2015
Department of Biological Sciences - University of Cape Town

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