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Zandvlei: Lower Estuary (34071828)

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

SppCommon nameTaxonomic nameMinAvgMaxIBASubregional
1016Anas platyrhynchos114.22201
10015Anas hybrid145.85207
4150Albatross, ShyThalassarche cauta22.002
269Avocet, PiedRecurvirostra avosetta115.3360   
67Bittern, LittleIxobrychus minutus11.001   
212Coot, Red-knobbedFulica cristata1404.982074   
48Cormorant, CapePhalacrocorax capensis127.69205   
51Cormorant, CrownedMicrocarbo coronatus11.001   
50Cormorant, ReedMicrocarbo africanus153.07463   
47Cormorant, White-breasted Phalacrocorax lucidus111.7388   
52Darter, AfricanAnhinga rufa122.12115   
10006Duck, DomesticAnas platyrhynchos18.8361
10005Duck, HybridAnas hybrid29.8630
10034Duck, Hyrbid Mallard/Yellow-billedAnas platyrhynchos x undulata113.8043
10014Duck, UnidentifiedN/A N/A114.5028
104Duck, White-backedThalassornis leuconotus133.0073   
100Duck, White-faced WhistlingDendrocygna viduata22.002   
96Duck, Yellow-billedAnas undulata113.9846   
149Eagle, African FishHaliaeetus vocifer11.502
60Egret, IntermediateArdea intermedia13.0911   
59Egret, LittleEgretta garzetta16.8957   
61Egret, Western CattleBubulcus ibis14.0327   
86Flamingo, Greater Phoenicopterus roseus258.91224   
87Flamingo, LesserPhoeniconaias minor16.6715   
44Gannet, CapeMorus capensis11.001
10004Goose, DomesticAnser anser11.502
89Goose, EgyptianAlopochen aegyptiaca2215.481121   
88Goose, Spur-wingedPlectropterus gambensis18.6448   
5Grebe, Black-neckedPodiceps nigricollis22.002   
4Grebe, Great CrestedPodiceps cristatus111.1643 25 
6Grebe, LittleTachybaptus ruficollis112.8399   
263Greenshank, CommonTringa nebularia11.001   
288Gull, Grey-headedChroicocephalus cirrocephalus16.3889   
289Gull, Hartlaub'sChroicocephalus hartlaubii390.60601250125300
287Gull, KelpLarus dominicanus241.03371300150 
10010Gull, UnidentifiedN/A N/A11.001
167Harrier, African MarshCircus ranivorus11.001
69Heron, Black-crowned NightNycticorax nycticorax12.6011   
55Heron, Black-headedArdea melanocephala11.305   
54Heron, GreyArdea cinerea12.7213   
57Heron, PurpleArdea purpurea11.213   
63Heron, StriatedButorides striata11.001   
81Ibis, African SacredThreskiornis aethiopicus15.7632   
83Ibis, GlossyPlegadis falcinellus11.785   
84Ibis, Hadada Bostrychia hagedash17.1926   
395Kingfisher, GiantMegaceryle maxima17.2032
397Kingfisher, MalachiteCorythornis cristatus11.001
394Kingfisher, PiedCeryle rudis14.8216
245Lapwing, BlacksmithVanellus armatus115.3065   
210Moorhen, CommonGallinula chloropus16.0367   
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 hypoleucos11.332  
262Sandpiper, MarshTringa stagnatilis5353.0053   
90Shelduck, South AfricanTadorna cana38.0013   
94Shoveler, CapeSpatula smithii16.1635   
85Spoonbill, AfricanPlatalea alba14.4531   
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 caspia15.0521  20
291Tern, CommonSterna hirundo16.9153   
298Tern, Greater CrestedThalasseus bergii12.736   
296Tern, SandwichThalasseus sandvicensis15.5715   
10009Tern, UnidentifiedN/A N/A23.004
305Tern, WhiskeredChlidonias hybrida11.802   
304Tern, White-wingedChlidonias leucopterus55.005   
274Thick-knee, WaterBurhinus vermiculatus13.5810   
10008Wader, UnidentifiedN/A N/A33.003
686Wagtail, CapeMotacilla capensis16.3723
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Wednesday 06 December 2023 08:22
FitzPatrick Institute of African Ornithology
Department of Biological Sciences - University of Cape Town

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