Island of the Birds, near the Valdez Peninsula, Chubut, Argentina (1991).

Rio Aquidaban, in Northeastern Paraguay (1992).

River Ganges, upstream of Hariduar, Uttaranchal, India (1993).

Rio Pajeu at Floresta, in the backlands of Pernambuco, Brazil (1992).

River at Uniao dos Palmares, Alagoas, Brazil (1993).

Rio Sao Francisco, upstream of Paulo Afonso, Pernambuco, Brazil (1989).

Rio Sao Francisco, near its mouth, in Pernambuco, Brazil (1989).

River Tagus at Villa Franca, Portugal (1986).

Riacho Feiticeiro, in the backlands of Ceara, Northeastern Brazil (1993).

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