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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
1016Anas platyrhynchos114.54201
10015Anas hybrid147.39207
4150Albatross, ShyThalassarche cauta22.002
269Avocet, PiedRecurvirostra avosetta115.0960   
67Bittern, LittleIxobrychus minutus11.001   
212Coot, Red-knobbedFulica cristata1418.372074   
48Cormorant, CapePhalacrocorax capensis125.10164   
51Cormorant, CrownedMicrocarbo coronatus11.001   
50Cormorant, ReedMicrocarbo africanus152.64463   
47Cormorant, White-breasted Phalacrocorax lucidus111.9188   
52Darter, AfricanAnhinga rufa121.96115   
10006Duck, DomesticAnas platyrhynchos18.8361
10005Duck, HybridAnas hybrid210.6730
10034Duck, Hyrbid Mallard/Yellow-billedAnas platyrhynchos x undulata115.0043
10014Duck, UnidentifiedN/A N/A114.5028
104Duck, White-backedThalassornis leuconotus133.0073   
100Duck, White-faced WhistlingDendrocygna viduata22.002   
96Duck, Yellow-billedAnas undulata112.7046   
149Eagle, African FishHaliaeetus vocifer11.502
60Egret, IntermediateArdea intermedia13.0911   
59Egret, LittleEgretta garzetta16.6757   
61Egret, Western CattleBubulcus ibis14.1227   
86Flamingo, Greater Phoenicopterus roseus264.30224   
87Flamingo, LesserPhoeniconaias minor12.504   
44Gannet, CapeMorus capensis11.001
10004Goose, DomesticAnser anser11.502
89Goose, EgyptianAlopochen aegyptiaca2218.911121   
88Goose, Spur-wingedPlectropterus gambensis18.6448   
5Grebe, Black-neckedPodiceps nigricollis22.002   
4Grebe, Great CrestedPodiceps cristatus111.4243 25 
6Grebe, LittleTachybaptus ruficollis112.8399   
263Greenshank, CommonTringa nebularia11.001   
288Gull, Grey-headedChroicocephalus cirrocephalus16.5089   
289Gull, Hartlaub'sChroicocephalus hartlaubii593.26601250125300
287Gull, KelpLarus dominicanus238.33371300150 
10010Gull, UnidentifiedN/A N/A11.001
167Harrier, African MarshCircus ranivorus11.001
69Heron, Black-crowned NightNycticorax nycticorax12.6711   
55Heron, Black-headedArdea melanocephala11.325   
54Heron, GreyArdea cinerea12.489   
57Heron, PurpleArdea purpurea11.223   
81Ibis, African SacredThreskiornis aethiopicus15.3432   
83Ibis, GlossyPlegadis falcinellus11.785   
84Ibis, Hadada Bostrychia hagedash17.0726   
395Kingfisher, GiantMegaceryle maxima11.001
397Kingfisher, MalachiteCorythornis cristatus11.001
394Kingfisher, PiedCeryle rudis14.6516
245Lapwing, BlacksmithVanellus armatus115.6465   
210Moorhen, CommonGallinula chloropus16.1467   
42Pelican, Great WhitePelecanus onocrotalus16.9133   
241Plover, GreyPluvialis squatarola22.002   
237Plover, Kittlitz'sCharadrius pecuarius11.001   
238Plover, Three-bandedCharadrius tricollaris11.402   
235Plover, White-frontedCharadrius marginatus9494.0094   
102Pochard, SouthernNetta erythrophthalma11.001   
258Sandpiper, CommonActitis hypoleucos11.402  
262Sandpiper, MarshTringa stagnatilis5353.0053   
90Shelduck, South AfricanTadorna cana38.0013   
94Shoveler, CapeSpatula smithii16.1735   
85Spoonbill, AfricanPlatalea alba14.1731   
270Stilt, Black-wingedHimantopus himantopus17.6732   
208Swamphen, AfricanPorphyrio madagascariensis22.002  
10007Swan, Black Cygnus atratus11.001
99Teal, Blue-billedSpatula hottentota44.004   
98Teal, CapeAnas capensis13.3316   
1274Teal, EurasianAnas crecca1010.0010
97Teal, Red-billedAnas erythrorhyncha22.002   
290Tern, CaspianHydroprogne caspia14.9421  20
291Tern, CommonSterna hirundo15.4219   
298Tern, Greater CrestedThalasseus bergii12.606   
296Tern, SandwichThalasseus sandvicensis15.3115   
10009Tern, UnidentifiedN/A N/A23.004
305Tern, WhiskeredChlidonias hybrida11.802   
304Tern, White-wingedChlidonias leucopterus55.005   
274Thick-knee, WaterBurhinus vermiculatus14.0010   
10008Wader, UnidentifiedN/A N/A33.003
686Wagtail, CapeMotacilla capensis16.4123
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Monday 06 February 2023 05:36
FitzPatrick Institute of African Ornithology
Department of Biological Sciences - University of Cape Town

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