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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.

Spp	Common name	Taxonomic name	Min	Avg	Max	IBA	Subregional IBA	RAMSAR
1016		Anas platyrhynchos	1	14.22	201
10015		Anas hybrid	1	45.85	207
4150	Albatross, Shy	Thalassarche cauta	2	2.00	2
269	Avocet, Pied	Recurvirostra avosetta	1	15.33	60
67	Bittern, Little	Ixobrychus minutus	1	1.00	1
212	Coot, Red-knobbed	Fulica cristata	1	400.83	2074
48	Cormorant, Cape	Phalacrocorax capensis	1	27.34	205
51	Cormorant, Crowned	Microcarbo coronatus	1	1.00	1
50	Cormorant, Reed	Microcarbo africanus	1	53.02	463
47	Cormorant, White-breasted	Phalacrocorax lucidus	1	11.65	88
52	Darter, African	Anhinga rufa	1	21.88	115
10006	Duck, Domestic	Anas platyrhynchos	1	8.83	61
10005	Duck, Hybrid	Anas hybrid	2	9.86	30
10034	Duck, Hyrbid Mallard/Yellow-billed	Anas platyrhynchos x undulata	1	13.80	43
10014	Duck, Unidentified	N/A N/A	1	14.50	28
104	Duck, White-backed	Thalassornis leuconotus	1	33.00	73
100	Duck, White-faced Whistling	Dendrocygna viduata	2	2.00	2
96	Duck, Yellow-billed	Anas undulata	1	13.98	46
149	Eagle, African Fish	Haliaeetus vocifer	1	1.50	2
60	Egret, Intermediate	Ardea intermedia	1	3.09	11
59	Egret, Little	Egretta garzetta	1	6.82	57
61	Egret, Western Cattle	Bubulcus ibis	1	4.03	27
86	Flamingo, Greater	Phoenicopterus roseus	2	58.91	224
87	Flamingo, Lesser	Phoeniconaias minor	1	6.67	15
44	Gannet, Cape	Morus capensis	1	1.00	1
10004	Goose, Domestic	Anser anser	1	1.50	2
89	Goose, Egyptian	Alopochen aegyptiaca	2	215.81	1121
88	Goose, Spur-winged	Plectropterus gambensis	1	8.64	48
5	Grebe, Black-necked	Podiceps nigricollis	2	2.00	2
4	Grebe, Great Crested	Podiceps cristatus	1	11.16	43		25
6	Grebe, Little	Tachybaptus ruficollis	1	12.83	99
263	Greenshank, Common	Tringa nebularia	1	1.00	1
288	Gull, Grey-headed	Chroicocephalus cirrocephalus	1	6.38	89
289	Gull, Hartlaub's	Chroicocephalus hartlaubii	3	90.79	601	250	125	300
287	Gull, Kelp	Larus dominicanus	2	41.40	371	300	150
10010	Gull, Unidentified	N/A N/A	1	1.00	1
167	Harrier, African Marsh	Circus ranivorus	1	1.00	1
69	Heron, Black-crowned Night	Nycticorax nycticorax	1	2.60	11
55	Heron, Black-headed	Ardea melanocephala	1	1.38	5
54	Heron, Grey	Ardea cinerea	1	2.87	13
57	Heron, Purple	Ardea purpurea	1	1.21	3
63	Heron, Striated	Butorides striata	1	1.00	1
81	Ibis, African Sacred	Threskiornis aethiopicus	1	5.84	32
83	Ibis, Glossy	Plegadis falcinellus	1	1.78	5
84	Ibis, Hadada	Bostrychia hagedash	1	7.19	26
395	Kingfisher, Giant	Megaceryle maxima	1	7.20	32
397	Kingfisher, Malachite	Corythornis cristatus	1	1.00	1
394	Kingfisher, Pied	Ceryle rudis	1	4.78	16
245	Lapwing, Blacksmith	Vanellus armatus	1	15.27	65
210	Moorhen, Common	Gallinula chloropus	1	6.03	67
42	Pelican, Great White	Pelecanus onocrotalus	1	6.91	33
241	Plover, Grey	Pluvialis squatarola	2	2.00	2
237	Plover, Kittlitz's	Charadrius pecuarius	1	1.00	1
238	Plover, Three-banded	Charadrius tricollaris	1	1.50	2
235	Plover, White-fronted	Charadrius marginatus	94	94.00	94
102	Pochard, Southern	Netta erythrophthalma	1	1.00	1
258	Sandpiper, Common	Actitis hypoleucos	1	1.33	2
262	Sandpiper, Marsh	Tringa stagnatilis	53	53.00	53
90	Shelduck, South African	Tadorna cana	3	8.00	13
94	Shoveler, Cape	Spatula smithii	1	6.16	35
85	Spoonbill, African	Platalea alba	1	4.45	31
270	Stilt, Black-winged	Himantopus himantopus	1	7.67	32
208	Swamphen, African	Porphyrio madagascariensis	2	2.00	2
10007	Swan, Black	Cygnus atratus	1	1.00	1
99	Teal, Blue-billed	Spatula hottentota	4	4.00	4
98	Teal, Cape	Anas capensis	1	3.33	16
1274	Teal, Eurasian	Anas crecca	10	10.00	10
97	Teal, Red-billed	Anas erythrorhyncha	2	2.00	2
290	Tern, Caspian	Hydroprogne caspia	1	5.21	21			20
291	Tern, Common	Sterna hirundo	1	7.15	53
298	Tern, Greater Crested	Thalasseus bergii	1	2.73	6
296	Tern, Sandwich	Thalasseus sandvicensis	1	5.73	15
10009	Tern, Unidentified	N/A N/A	2	3.00	4
305	Tern, Whiskered	Chlidonias hybrida	1	1.80	2
304	Tern, White-winged	Chlidonias leucopterus	5	5.00	5
274	Thick-knee, Water	Burhinus vermiculatus	1	3.62	10
10008	Wader, Unidentified	N/A N/A	3	3.00	3
686	Wagtail, Cape	Motacilla capensis	1	6.34	23

Saturday 20 April 2024 04:45
FitzPatrick Institute of African Ornithology
Department of Biological Sciences - University of Cape Town

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Zandvlei: Lower Estuary (34071828)

Western Cape

Information