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Zandvlei: Lower Estuary (34071828)

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
2001-01-20
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. This site covers the major part of the estuary from the Sea Scout base southwards to the mouth.

SppCommon nameTaxonomic nameMinAvgMaxIBASubregional
IBA
RAMSAR
4150Albatross, ShyThalassarche cauta22.002
269Avocet, PiedRecurvirostra avosetta117.1160  
67Bittern, LittleIxobrychus minutus11.001   
212Coot, Red-knobbedFulica cristata5455.672074   
48Cormorant, CapePhalacrocorax capensis128.71164   
51Cormorant, CrownedPhalacrocorax coronatus11.001   
50Cormorant, ReedPhalacrocorax africanus152.71463   
47Cormorant, White-breastedPhalacrocorax carbo112.3288   
52Darter, AfricanAnhinga rufa123.19115   
10006Duck, DomesticAnas platyrhynchos18.8361
10005Duck, HybridAnas hybrid26.8023
10015Duck, Hybrid MallardAnas hybrid148.37207
1016Duck, MallardAnas platyrhynchos115.25201
10014Duck, UnidentifiedN/A N/A114.5028
104Duck, White-backedThalassornis leuconotus133.0073   
100Duck, White-facedDendrocygna viduata22.002   
96Duck, Yellow-billedAnas undulata012.1846   
61Egret, CattleBubulcus ibis13.4117   
59Egret, LittleEgretta garzetta16.4357   
60Egret, Yellow-billedEgretta intermedia12.309   
149Fish-eagle, AfricanHaliaeetus vocifer11.502
86Flamingo, GreaterPhoenicopterus ruber679.25224   
87Flamingo, LesserPhoenicopterus minor12.504   
44Gannet, CapeMorus capensis11.001
10004Goose, DomesticAnser anser11.502
89Goose, EgyptianAlopochen aegyptiacus2237.091121   
88Goose, Spur-wingedPlectropterus gambensis18.7748   
5Grebe, Black-neckedPodiceps nigricollis22.002   
4Grebe, Great CrestedPodiceps cristatus112.1943 25 
6Grebe, LittleTachybaptus ruficollis113.0999   
288Gull, Grey-headedLarus cirrocephalus17.0089   
289Gull, Hartlaub'sLarus hartlaubii992.35601250125300
287Gull, KelpLarus dominicanus232.47287 150 
10010Gull, UnidentifiedN/A N/A11.001
55Heron, Black-headedArdea melanocephala11.062   
54Heron, GreyArdea cinerea12.389   
57Heron, PurpleArdea purpurea11.263   
81Ibis, African SacredThreskiornis aethiopicus15.0532   
83Ibis, GlossyPlegadis falcinellus11.785   
84Ibis, HadedaBostrychia hagedash17.4826   
395Kingfisher, GiantMegaceryle maximus11.001
397Kingfisher, MalachiteAlcedo cristata11.001
394Kingfisher, PiedCeryle rudis14.5216
245Lapwing, BlacksmithVanellus armatus116.2565   
167Marsh-harrier, AfricanCircus ranivorus11.001
210Moorhen, CommonGallinula chloropus16.1467   
69Night-Heron, Black-crownedNycticorax nycticorax12.8811  
42Pelican, Great WhitePelecanus onocrotalus16.9133   
241Plover, GreyPluvialis squatarola22.002   
237Plover, Kittlitz'sCharadrius pecuarius11.001   
238Plover, Three-bandedCharadrius tricollaris11.502   
235Plover, White-frontedCharadrius marginatus9494.0094   
102Pochard, SouthernNetta erythrophthalma11.001   
258Sandpiper, CommonActitis hypoleucos11.402  
262Sandpiper, MarshTringa stagnatilis5353.0053   
90Shelduck, South AfricanTadorna cana38.0013   
94Shoveler, CapeAnas smithii16.1735   
85Spoonbill, AfricanPlatalea alba14.2431   
270Stilt, Black-wingedHimantopus himantopus17.4532  
208Swamphen, African PurplePorphyrio madagascariensis22.002  
10007Swan, Black Cygnus atratus11.001
98Teal, CapeAnas capensis12.7616   
1274Teal, CommonAnas crecca1010.0010
99Teal, HottentotAnas hottentota44.004   
97Teal, Red-billedAnas erythrorhyncha22.002   
290Tern, CaspianSterna caspia14.8921  20
291Tern, CommonSterna hirundo15.7819   
296Tern, SandwichSterna sandvicensis14.0014   
298Tern, SwiftSterna bergii13.006   
10009Tern, UnidentifiedN/A N/A23.004
305Tern, WhiskeredChlidonias hybrida11.802   
304Tern, White-wingedChlidonias leucopterus55.005   
274Thick-knee, WaterBurhinus vermiculatus14.3810   
10008Wader, UnidentifiedN/A N/A33.003
686Wagtail, CapeMotacilla capensis16.6123
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Saturday 15 August 2020 06:54
FitzPatrick Institute of African Ornithology
Department of Biological Sciences - University of Cape Town

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