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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 platyrhynchos113.78201
4150Albatross, ShyThalassarche cauta22.002
269Avocet, PiedRecurvirostra avosetta115.3360   
67Bittern, LittleIxobrychus minutus11.001   
212Coot, Red-knobbedFulica cristata1389.082074   
48Cormorant, CapePhalacrocorax capensis130.74282   
51Cormorant, CrownedMicrocarbo coronatus11.001   
50Cormorant, ReedMicrocarbo africanus153.12463   
47Cormorant, White-breastedPhalacrocorax lucidus111.9988   
52Darter, AfricanAnhinga rufa121.80115   
10006Duck, DomesticAnas platyrhynchos domesticus18.8361
10005Duck, HybridAnas hybrid211.8830
10034Duck, Hyrbid Mallard/Yellow-billedAnas platyrhynchos x undulata112.3343
10014Duck, UnidentifiedAnas sp.114.5028
104Duck, White-backedThalassornis leuconotus133.0073   
100Duck, White-faced WhistlingDendrocygna viduata22.002   
96Duck, Yellow-billedAnas undulata114.2946   
60Egret, IntermediateArdea intermedia13.0911   
59Egret, LittleEgretta garzetta17.7580   
61Egret, Western CattleBubulcus ibis14.0327   
149Fish Eagle, AfricanHaliaeetus vocifer11.502
86Flamingo, GreaterPhoenicopterus roseus154.08224   
87Flamingo, LesserPhoeniconaias minor16.6715   
44Gannet, CapeMorus capensis11.001
10004Goose, DomesticAnser anser domesticus11.502
89Goose, EgyptianAlopochen aegyptiaca2212.401121   
88Goose, Spur-wingedPlectropterus gambensis18.6448   
5Grebe, Black-neckedPodiceps nigricollis22.002   
4Grebe, Great CrestedPodiceps cristatus110.9443 25 
6Grebe, LittleTachybaptus ruficollis112.8399   
263Greenshank, CommonTringa nebularia11.001   
288Gull, Grey-headedChroicocephalus cirrocephalus16.1889   
289Gull, Hartlaub'sChroicocephalus hartlaubii391.43601250125300
287Gull, KelpLarus dominicanus242.30371300150 
10010Gull, UnidentifiedLanus sp.11.001
167Harrier, African MarshCircus ranivorus11.001
55Heron, Black-headedArdea melanocephala11.395   
54Heron, GreyArdea cinerea13.4640   
57Heron, PurpleArdea purpurea11.213   
63Heron, StriatedButorides striata11.001   
81Ibis, African SacredThreskiornis aethiopicus16.2132   
83Ibis, GlossyPlegadis falcinellus11.705   
84Ibis, HadadaBostrychia hagedash17.3926   
395Kingfisher, GiantMegaceryle maxima17.2032
397Kingfisher, MalachiteCorythornis cristatus11.001
394Kingfisher, PiedCeryle rudis15.0418
245Lapwing, BlacksmithVanellus armatus115.1265   
10015Mallard, HybridAnas hybrid144.15207
210Moorhen, CommonGallinula chloropus16.0867   
69Night Heron, Black-crownedNycticorax nycticorax13.3312   
42Pelican, Great WhitePelecanus onocrotalus16.9133   
241Plover, GreyPluvialis squatarola22.002   
237Plover, Kittlitz'sCharadrius pecuarius11.001   
238Plover, Three-bandedCharadrius tricollaris11.382   
235Plover, White-frontedCharadrius marginatus9494.0094   
102Pochard, SouthernNetta erythrophthalma11.001   
258Sandpiper, CommonActitis hypoleucos11.332  
262Sandpiper, MarshTringa stagnatilis5353.0053   
90Shelduck, South AfricanTadorna cana38.0013   
94Shoveler, CapeAnas smithii16.1635   
85Spoonbill, AfricanPlatalea alba14.4531   
270Stilt, Black-wingedHimantopus himantopus17.6732   
208Swamphen, AfricanPorphyrio madagascariensis22.002  
10007Swan, BlackCygnus atratus11.001
99Teal, Blue-billedAnas hottentota44.004   
98Teal, CapeAnas capensis13.3316   
1274Teal, Green-wingedAnas carolinensis1010.0010
97Teal, Red-billedAnas erythrorhyncha22.002   
290Tern, CaspianHydroprogne caspia15.0721  20
291Tern, CommonSterna hirundo17.0653   
298Tern, Greater CrestedThalasseus bergii12.676   
935Tern, RoyalThalasseus maximus22.002 
296Tern, SandwichThalasseus sandvicensis15.7515   
10009Tern, UnidentifiedN/A N/A23.004
305Tern, WhiskeredChlidonias hybrida11.802   
304Tern, White-wingedChlidonias leucopterus55.005   
274Thick-knee, WaterBurhinus vermiculatus13.5310   
10008Wader, UnidentifiedN/A N/A33.003
686Wagtail, CapeMotacilla capensis16.2623
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Monday 30 December 2024 07:37
FitzPatrick Institute of African Ornithology
Department of Biological Sciences - University of Cape Town

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