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Groenvlei Lake (34012252)

Western Cape

Authority Cape Nature
Management status UNKNOWN
Conservation status UNKNOWN
Ramsar information
Heritage information
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The only South African drowned deflation basin lake, with no stream inflow and with seepage outlets to the sea. Extensive fringing and emergent sedgemarsh and reedmarsh, with surrounding rank grassland. Existing counts are too few and too restricted to reflect the site''s importance: it may hold significant numbers of Redchested Flufftail and other secretive rails, and of Little Bittern, while the uncommon Grass Owl occurs. Threats include uncontrolled burning, eutrophication, alien vegetation, and increasing Phragmites cover at the expense of other marsh vegetation, possibly due to cessation of grazing.

SppCommon nameTaxonomic nameMinAvgMaxIBASubregional
67Bittern, LittleIxobrychus minutus12.006   
212Coot, Red-knobbedFulica cristata9296.211123   
48Cormorant, CapePhalacrocorax capensis132.7561   
50Cormorant, ReedMicrocarbo africanus161.66175   
47Cormorant, White-breasted Phalacrocorax lucidus118.6288   
203Crake, BlackZapornia flavirostra14.1614
52Darter, AfricanAnhinga rufa114.4975   
95Duck, African BlackAnas sparsa11.001   
104Duck, White-backedThalassornis leuconotus11.712   
100Duck, White-faced WhistlingDendrocygna viduata22.503   
96Duck, Yellow-billedAnas undulata18.9672   
149Eagle, African FishHaliaeetus vocifer11.878
58Egret, GreatArdea alba11.001   
59Egret, LittleEgretta garzetta11.433   
61Egret, Western CattleBubulcus ibis12.506   
893Gallinule, PurplePorphyrio martinica77.007
89Goose, EgyptianAlopochen aegyptiaca15.8226   
88Goose, Spur-wingedPlectropterus gambensis19.0851   
5Grebe, Black-neckedPodiceps nigricollis110.5020   
4Grebe, Great CrestedPodiceps cristatus19.76535025 
6Grebe, LittleTachybaptus ruficollis153.87302 250 
287Gull, KelpLarus dominicanus13.1612   
167Harrier, African MarshCircus ranivorus11.583
69Heron, Black-crowned NightNycticorax nycticorax33.003   
55Heron, Black-headedArdea melanocephala11.402   
54Heron, GreyArdea cinerea11.252   
57Heron, PurpleArdea purpurea14.2512   
70Heron, White-backed NightGorsachius leuconotus22.002   
83Ibis, GlossyPlegadis falcinellus22.002   
84Ibis, Hadada Bostrychia hagedash13.8314   
395Kingfisher, GiantMegaceryle maxima11.453
397Kingfisher, MalachiteCorythornis cristatus13.5417
394Kingfisher, PiedCeryle rudis13.3613
245Lapwing, BlacksmithVanellus armatus12.636   
509Martin, Brown-throatedRiparia paludicola11.001
210Moorhen, CommonGallinula chloropus14.6237   
74Openbill, AfricanAnastomus lamelligerus11.001   
172Osprey, WesternPandion haliaetus11.001
238Plover, Three-bandedCharadrius tricollaris12.504   
197Rail, AfricanRallus caerulescens12.206-1
90Shelduck, South AfricanTadorna cana99.009   
94Shoveler, CapeSpatula smithii22.002   
85Spoonbill, AfricanPlatalea alba12.003   
270Stilt, Black-wingedHimantopus himantopus33.003   
208Swamphen, AfricanPorphyrio madagascariensis17.0316  
99Teal, Blue-billedSpatula hottentota12.336   
98Teal, CapeAnas capensis33.003   
97Teal, Red-billedAnas erythrorhyncha11.001   
290Tern, CaspianHydroprogne caspia12.207   
291Tern, CommonSterna hirundo122.23115   
10009Tern, UnidentifiedN/A N/A11.001
274Thick-knee, WaterBurhinus vermiculatus12.605   
685Wagtail, African PiedMotacilla aguimp33.003
686Wagtail, CapeMotacilla capensis13.0010
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Monday 06 February 2023 04:52
FitzPatrick Institute of African Ornithology
Department of Biological Sciences - University of Cape Town

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