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Wekas may be sexed with a reasonable degree of accuracy by measuring culmen length and body weight. Culmen lengths in adult males commonly range from 44 mm to 51 mm and in females from 42 mm to 44 mm. Males usually weigh between 900 gm and 1000 gm and females between 670 gm and 806 gm. Juvenile birds may be confused with adult females but are usually distinguishable by the dark colour of their eyes and legs.