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Zandvlei: Upper Estuary (34061828)
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
1993-01-09
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. The site covers the pans in the Zandvlei Nature Reserve and the upper parts of the estuary down to the Sea Scout base.

Spp	Common name	Taxonomic name	Min	Avg	Max	IBA	Subregional IBA	RAMSAR
1016		Anas platyrhynchos	1	8.54	56
269	Avocet, Pied	Recurvirostra avosetta	1	42.71	180		125
67	Bittern, Little	Ixobrychus minutus	1	1.38	3
212	Coot, Red-knobbed	Fulica cristata	7	406.57	3262		2500
48	Cormorant, Cape	Phalacrocorax capensis	1	32.22	205
50	Cormorant, Reed	Microcarbo africanus	2	38.45	279
47	Cormorant, White-breasted	Phalacrocorax lucidus	1	12.05	146			130
52	Darter, African	Anhinga rufa	1	20.63	97
95	Duck, African Black	Anas sparsa	2	2.00	2
10006	Duck, Domestic	Anas platyrhynchos domesticus	1	13.42	61
10005	Duck, Hybrid	Anas hybrid	2	15.00	40
10034	Duck, Hyrbid Mallard/Yellow-billed	Anas platyrhynchos x undulata	4	7.67	15
103	Duck, Maccoa	Oxyura maccoa	6	6.00	6
1017	Duck, Mandarin	Aix galericulata	1	1.00	1
10014	Duck, Unidentified	Anas sp.	1	7.88	23
104	Duck, White-backed	Thalassornis leuconotus	2	33.87	96
100	Duck, White-faced Whistling	Dendrocygna viduata	9	13.33	16
96	Duck, Yellow-billed	Anas undulata	1	24.04	153
60	Egret, Intermediate	Ardea intermedia	1	1.96	15
59	Egret, Little	Egretta garzetta	1	7.82	42
982	Egret, Slaty	Egretta vinaceigula	1	1.00	1
61	Egret, Western Cattle	Bubulcus ibis	1	3.00	20
149	Fish Eagle, African	Haliaeetus vocifer	1	1.45	3
86	Flamingo, Greater	Phoenicopterus roseus	2	49.85	229
87	Flamingo, Lesser	Phoeniconaias minor	2	11.43	27
44	Gannet, Cape	Morus capensis	1	1.00	1
89	Goose, Egyptian	Alopochen aegyptiaca	1	44.08	1121
88	Goose, Spur-winged	Plectropterus gambensis	1	8.00	60
5	Grebe, Black-necked	Podiceps nigricollis	2	6.00	10
4	Grebe, Great Crested	Podiceps cristatus	1	9.53	44		25
6	Grebe, Little	Tachybaptus ruficollis	1	10.52	51
263	Greenshank, Common	Tringa nebularia	1	1.25	2
288	Gull, Grey-headed	Chroicocephalus cirrocephalus	1	5.72	36
289	Gull, Hartlaub's	Chroicocephalus hartlaubii	1	51.89	309	250	125	300
287	Gull, Kelp	Larus dominicanus	1	17.06	190		150
167	Harrier, African Marsh	Circus ranivorus	1	1.20	2
64	Heron, Black	Egretta ardesiaca	1	1.00	1
55	Heron, Black-headed	Ardea melanocephala	1	1.38	6
54	Heron, Grey	Ardea cinerea	1	2.93	15
57	Heron, Purple	Ardea purpurea	1	1.86	5
62	Heron, Squacco	Ardeola ralloides	1	1.00	1
63	Heron, Striated	Butorides striata	1	1.00	1
10011	Heron, Unidentified	Ardea sp.	1	1.00	1
81	Ibis, African Sacred	Threskiornis aethiopicus	1	9.34	111
83	Ibis, Glossy	Plegadis falcinellus	1	3.38	8
84	Ibis, Hadada	Bostrychia hagedash	1	4.44	13
228	Jacana, African	Actophilornis africanus	1	1.00	1
395	Kingfisher, Giant	Megaceryle maxima	1	1.28	2
397	Kingfisher, Malachite	Corythornis cristatus	1	1.89	6
394	Kingfisher, Pied	Ceryle rudis	1	7.13	19
245	Lapwing, Blacksmith	Vanellus armatus	1	11.65	112
10015	Mallard, Hybrid	Anas hybrid	1	38.70	169
509	Martin, Brown-throated	Riparia paludicola	1	1.00	1
210	Moorhen, Common	Gallinula chloropus	1	11.75	82
69	Night Heron, Black-crowned	Nycticorax nycticorax	1	6.90	31
230	Painted-snipe, Greater	Rostratula benghalensis	1	1.00	1
42	Pelican, Great White	Pelecanus onocrotalus	1	5.95	17
241	Plover, Grey	Pluvialis squatarola	1	1.00	1
237	Plover, Kittlitz's	Charadrius pecuarius	1	2.00	5
238	Plover, Three-banded	Charadrius tricollaris	1	2.73	9
102	Pochard, Southern	Netta erythrophthalma	1	1.75	2
258	Sandpiper, Common	Actitis hypoleucos	1	1.33	2
262	Sandpiper, Marsh	Tringa stagnatilis	1	1.50	2
264	Sandpiper, Wood	Tringa glareola	1	1.25	2
90	Shelduck, South African	Tadorna cana	2	2.00	2
94	Shoveler, Cape	Anas smithii	1	9.28	49
85	Spoonbill, African	Platalea alba	1	4.73	31
270	Stilt, Black-winged	Himantopus himantopus	1	12.93	54
78	Stork, Abdim's	Ciconia abdimii	19	19.00	19
76	Stork, Yellow-billed	Mycteria ibis	1	1.00	1
208	Swamphen, African	Porphyrio madagascariensis	1	1.95	5
10007	Swan, Black	Cygnus atratus	1	1.00	1
884	Swan, Mute	Cygnus olor	2	2.00	2
99	Teal, Blue-billed	Anas hottentota	1	2.50	4
98	Teal, Cape	Anas capensis	1	12.34	40
97	Teal, Red-billed	Anas erythrorhyncha	1	3.69	8
290	Tern, Caspian	Hydroprogne caspia	1	3.93	16
291	Tern, Common	Sterna hirundo	1	3.16	13
298	Tern, Greater Crested	Thalasseus bergii	1	1.89	4
296	Tern, Sandwich	Thalasseus sandvicensis	1	1.14	2
10009	Tern, Unidentified	N/A N/A	4	4.00	4
305	Tern, Whiskered	Chlidonias hybrida	1	1.67	3
304	Tern, White-winged	Chlidonias leucopterus	1	3.67	11
274	Thick-knee, Water	Burhinus vermiculatus	1	2.40	7
10008	Wader, Unidentified	N/A N/A	1	1.00	1
686	Wagtail, Cape	Motacilla capensis	1	5.15	18

Saturday 21 December 2024 06:55
FitzPatrick Institute of African Ornithology
Department of Biological Sciences - University of Cape Town

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Zandvlei: Upper Estuary (34061828)

Western Cape

Information