The Barbu d’Uccle or Belgian d’Uccle, Dutch: Ukkelse Baardkriel, is a Belgian breed of bearded bantam chicken. It was first bred in the town of Uccle on the outskirts of Brussels, Belgium.
The Barbu d’Uccle has a low posture, full beard and Muff a short but well developed neck,body broad and deep. Back very broad, almost hidden by enormous neck hackle. Breast extremely broad, the upper part very developed and carried forward, the lower part resembling a breastplate. Tail well furnished, close and carried almost perpendicularly to the line of the back. Legs strong, short and well apart,… It has a single comb, unlike the Barbu d’Anvers, which has a rose comb.
The American standard specifies an ideal weight of 26 oz (740 g) for cocks, 22 oz (620 g) for hens and cockerels, and 20 oz (570 g) for pullets. The Poultry Club of Great Britain suggests as a rough guide a maximum weight of 790–910 g for males and 680–790 g for females, with variations taking into account age and maturity.
In Europe, colour varieties of the Barbu d’Uccle include Blue, Blue Quail, Cuckoo, Mille Fleur, Porcelain, Lavender, Lavender Quail, Black, Mottled, Silver Quail, Quail and White.
The American Poultry Association lists seven varieties: Black (1996), Golden Neck (1996), Mille Fleur (1914), Mottled (1996), Porcelain (1965), Self Blue (1996), and White (1981). source