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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
269Avocet, PiedRecurvirostra avosetta120.4360  
67Bittern, LittleIxobrychus minutus11.001   
212Coot, Red-knobbedFulica cristata5451.372074   
48Cormorant, CapePhalacrocorax capensis129.56164   
51Cormorant, CrownedPhalacrocorax coronatus11.001   
50Cormorant, ReedPhalacrocorax africanus137.57164   
47Cormorant, White-breastedPhalacrocorax carbo110.5988   
52Darter, AfricanAnhinga rufa122.36115   
10006Duck, DomesticAnas platyrhynchos19.2961
10005Duck, HybridAnas hybrid29.0023
10015Duck, Hybrid MallardAnas hybrid146.57207
1016Duck, MallardAnas platyrhynchos116.64201
10014Duck, UnidentifiedN/A N/A11.001
104Duck, White-backedThalassornis leuconotus133.0073   
100Duck, White-facedDendrocygna viduata22.002   
96Duck, Yellow-billedAnas undulata113.7346   
61Egret, CattleBubulcus ibis13.5717   
59Egret, LittleEgretta garzetta14.4818   
60Egret, Yellow-billedEgretta intermedia12.449   
149Fish-eagle, AfricanHaliaeetus vocifer11.672
86Flamingo, GreaterPhoenicopterus ruber684.33224   
87Flamingo, LesserPhoenicopterus minor12.504   
44Gannet, CapeMorus capensis11.001
10004Goose, DomesticAnser anser11.502
89Goose, EgyptianAlopochen aegyptiacus2240.661121   
88Goose, Spur-wingedPlectropterus gambensis110.8048   
5Grebe, Black-neckedPodiceps nigricollis22.002   
4Grebe, Great CrestedPodiceps cristatus111.7032 25 
6Grebe, LittleTachybaptus ruficollis112.6599   
288Gull, Grey-headedLarus cirrocephalus16.1489   
289Gull, Hartlaub'sLarus hartlaubii989.25601250125300
287Gull, KelpLarus dominicanus227.14137   
55Heron, Black-headedArdea melanocephala11.062   
54Heron, GreyArdea cinerea12.108   
57Heron, PurpleArdea purpurea11.203   
81Ibis, African SacredThreskiornis aethiopicus15.2332   
83Ibis, GlossyPlegadis falcinellus11.755   
84Ibis, HadedaBostrychia hagedash17.8126   
395Kingfisher, GiantMegaceryle maximus11.001
397Kingfisher, MalachiteAlcedo cristata11.001
394Kingfisher, PiedCeryle rudis13.9315
245Lapwing, BlacksmithVanellus armatus115.5865   
167Marsh-harrier, AfricanCircus ranivorus11.001
210Moorhen, CommonGallinula chloropus16.4267   
69Night-Heron, Black-crownedNycticorax nycticorax13.1411  
42Pelican, Great WhitePelecanus onocrotalus16.7833   
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 alba14.2531   
270Stilt, Black-wingedHimantopus himantopus17.4532  
208Swamphen, African PurplePorphyrio madagascariensis22.002  
10007Swan, Black Cygnus atratus11.001
98Teal, CapeAnas capensis12.9316   
99Teal, HottentotAnas hottentota44.004   
97Teal, Red-billedAnas erythrorhyncha22.002   
290Tern, CaspianSterna caspia15.0321  20
291Tern, CommonSterna hirundo16.1619   
296Tern, SandwichSterna sandvicensis12.206   
298Tern, SwiftSterna bergii13.676   
10009Tern, UnidentifiedN/A N/A44.004
305Tern, WhiskeredChlidonias hybrida11.502   
304Tern, White-wingedChlidonias leucopterus55.005   
274Thick-knee, WaterBurhinus vermiculatus14.5010   
10008Wader, UnidentifiedN/A N/A33.003
686Wagtail, CapeMotacilla capensis16.4423
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Monday 25 September 2017 08:34
© Animal Demography Unit 2015
Department of Biological Sciences - University of Cape Town

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