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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 avosetta143.20180 125
67Bittern, LittleIxobrychus minutus11.403   
212Coot, Red-knobbedFulica cristata7451.763262 2500 
48Cormorant, CapePhalacrocorax capensis128.46156   
50Cormorant, ReedPhalacrocorax africanus229.21149   
47Cormorant, White-breastedPhalacrocorax carbo112.95146  130
52Darter, AfricanAnhinga rufa222.1097   
95Duck, African BlackAnas sparsa22.002   
10006Duck, DomesticAnas platyrhynchos113.4261
10005Duck, HybridAnas hybrid29.6723
10015Duck, Hybrid MallardAnas hybrid143.44169
103Duck, MaccoaOxyura maccoa66.006   
1016Duck, MallardAnas platyrhynchos19.3656
1017Duck, MandarinAix galericulata11.001
10014Duck, UnidentifiedN/A N/A16.1423
104Duck, White-backedThalassornis leuconotus736.1496   
100Duck, White-facedDendrocygna viduata913.3316   
96Duck, Yellow-billedAnas undulata119.93153   
61Egret, CattleBubulcus ibis12.9020   
59Egret, LittleEgretta garzetta15.6422   
982Egret, SlatyEgretta vinaceigula11.001   
60Egret, Yellow-billedEgretta intermedia12.0815   
149Fish-eagle, AfricanHaliaeetus vocifer11.453
86Flamingo, GreaterPhoenicopterus ruber658.75123   
87Flamingo, LesserPhoenicopterus minor66.507   
44Gannet, CapeMorus capensis11.001
89Goose, EgyptianAlopochen aegyptiacus141.721121   
88Goose, Spur-wingedPlectropterus gambensis18.7660   
5Grebe, Black-neckedPodiceps nigricollis68.0010   
4Grebe, Great CrestedPodiceps cristatus210.2644 25 
6Grebe, LittleTachybaptus ruficollis110.9751   
263Greenshank, CommonTringa nebularia11.252   
288Gull, Grey-headedLarus cirrocephalus14.8014   
289Gull, Hartlaub'sLarus hartlaubii141.11309250125300
287Gull, KelpLarus dominicanus113.23146   
55Heron, Black-headedArdea melanocephala11.333   
54Heron, GreyArdea cinerea13.0615   
57Heron, PurpleArdea purpurea11.905   
62Heron, SquaccoArdeola ralloides11.001   
10011Heron, UnidentifiedN/A N/A11.001
81Ibis, African SacredThreskiornis aethiopicus18.0181   
83Ibis, GlossyPlegadis falcinellus13.388   
84Ibis, HadedaBostrychia hagedash14.7213   
228Jacana, AfricanActophilornis africanus11.001  
395Kingfisher, GiantMegaceryle maximus11.222
397Kingfisher, MalachiteAlcedo cristata11.886
394Kingfisher, PiedCeryle rudis17.0519
245Lapwing, BlacksmithVanellus armatus111.64112   
167Marsh-harrier, AfricanCircus ranivorus11.202
509Martin, Brown-throatedRiparia paludicola11.001
210Moorhen, CommonGallinula chloropus112.4982   
69Night-Heron, Black-crownedNycticorax nycticorax17.0331  
230Painted-snipe, GreaterRostratula benghalensis11.001  
42Pelican, Great WhitePelecanus onocrotalus15.9517   
241Plover, GreyPluvialis squatarola11.001   
237Plover, Kittlitz'sCharadrius pecuarius11.001   
238Plover, Three-bandedCharadrius tricollaris12.717   
102Pochard, SouthernNetta erythrophthalma11.752   
258Sandpiper, CommonActitis hypoleucos11.332  
262Sandpiper, MarshTringa stagnatilis11.502   
264Sandpiper, WoodTringa glareola11.252   
90Shelduck, South AfricanTadorna cana22.002   
94Shoveler, CapeAnas smithii19.3749   
85Spoonbill, AfricanPlatalea alba14.2931   
270Stilt, Black-wingedHimantopus himantopus113.4144  
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 capensis111.6140   
97Teal, Red-billedAnas erythrorhyncha13.338   
290Tern, CaspianSterna caspia13.8816   
291Tern, CommonSterna hirundo13.249   
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 capensis15.1318
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Tuesday 14 August 2018 01:23
© Animal Demography Unit 2015
Department of Biological Sciences - University of Cape Town

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