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Heyshope Dam: Bay 3 (27053023)

Mpumalanga

CWAC status REGISTERED-COUNTS SUSPENDED
Authority Private
Management status STATE IMPOUNDMENT
Conservation status UNKNOWN
IBA information SA020 - GRASSLAND BIOSPHERE RESERVE
Ramsar information
Heritage information
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Information 

Date_registered
1992-05-29
Brief_description
A large, state-owned storage dam in the Assegaai River catchment, surrounded by agricultural land (beef and maize production). Shoreline gently sloping; either heavily grazed or with rank grass and weeds. A proposed Ramsar site which holds extremely large numbers of at least 52 waterbird species, concentrated in the 17 bays where rivers enter the dam. Small areas which are regularly counted hold up to 45 000 waterbirds; the entire system may hold 100 000. In drought years the dam provides a refuge for birds from surrounding pans, including Lake Chrissie. Only one CWAC count available, for winter 1992, when only small sections of the dam were visited but nationally significant numbers of Yellowbilled Duck and Cape Shoveller were recorded, plus high counts of Dabchick, cormorants, ducks, geese, and shorebirds (including some Palaearctic species). Eutrophication, resulting from inflow of agricultural fertilisers, is a potential problem. Other problems could be posed by opencast coal mining and afforostation in the catchment areas. This important site should be monitored on a regular basis.

SppCommon nameTaxonomic nameMinAvgMaxIBASubregional
IBA
RAMSAR
212Coot, Red-knobbedFulica cristata21233415.004745 2500 
50Cormorant, ReedPhalacrocorax africanus2332.3339   
47Cormorant, White-breastedPhalacrocorax carbo88.008   
52Darter, AfricanAnhinga rufa36.6710   
103Duck, MaccoaOxyura maccoa44.004   
104Duck, White-backedThalassornis leuconotus415.5027   
100Duck, White-facedDendrocygna viduata829.0050   
96Duck, Yellow-billedAnas undulata1691495.0032381700850 
58Egret, GreatEgretta alba22.002   
60Egret, Yellow-billedEgretta intermedia11.001   
89Goose, EgyptianAlopochen aegyptiacus236.0091   
88Goose, Spur-wingedPlectropterus gambensis1109.33325   
4Grebe, Great CrestedPodiceps cristatus44.505   
6Grebe, LittleTachybaptus ruficollis1963.00140   
288Gull, Grey-headedLarus cirrocephalus311.3321   
54Heron, GreyArdea cinerea46.6711   
62Heron, SquaccoArdeola ralloides22.002   
81Ibis, African SacredThreskiornis aethiopicus11.001   
83Ibis, GlossyPlegadis falcinellus45.507   
228Jacana, AfricanActophilornis africanus13.506  
247Lapwing, African WattledVanellus senegallus11.001   
245Lapwing, BlacksmithVanellus armatus39.0018   
167Marsh-harrier, AfricanCircus ranivorus11.001
210Moorhen, CommonGallinula chloropus11.001   
237Plover, Kittlitz'sCharadrius pecuarius99.009   
238Plover, Three-bandedCharadrius tricollaris11.001   
102Pochard, SouthernNetta erythrophthalma526.3351   
90Shelduck, South AfricanTadorna cana1717.0017   
94Shoveler, CapeAnas smithii434.3380   
250Snipe, AfricanGallinago nigripennis2323.0023   
85Spoonbill, AfricanPlatalea alba33.003   
270Stilt, Black-wingedHimantopus himantopus2020.0020  
99Teal, HottentotAnas hottentota77.007   
97Teal, Red-billedAnas erythrorhyncha4391.00139   
305Tern, WhiskeredChlidonias hybrida22.002   
ADU logo Ramsar Wetlands International http://www.sanbi.org/


Thursday 23 November 2017 11:21
© Animal Demography Unit 2015
Department of Biological Sciences - University of Cape Town

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