Three colours of Campbell are recognised:
One of the first, certainly the most successful, of the utility breeds designed in the 20th century. The breed was created by Mrs Adele Campbell using a Rouen drake, a Fawn & White Runner duck, plus a little Mallard blood.
The Khaki Campbell largely took over as the top egg laying duck and the name is well-known today. The Khaki Campbell proved to be very agile, very fertile and extremely prolific. It has spawned many variants: the White Campbell, the Dark Campbell, the Welsh Harlequin (a simple mutation from the original Khaki), the Abacot Ranger (a cross back to a Runner) and the Whaylesbury hybrid (Welsh Harlequin and Aylesbury).
Although there is a strict standard for exhibition birds, many generic brown ducks are mis-sold as Khaki Campbells. The two marked colours of Campbell (Khaki and Dark) are dusky mallard; Khakis also have a brown dilution. Dusky Mallard, Khaki and White are also standardised for Calls, which share the same colour genotype; just being a different shape. Campbells have no eyestripes, and their speculum is never brightly coloured.
The Campbell is the top egg-laying duck with some utility strains laying over 300 eggs a year. It is an active light breed with drakes weighing 2.3-2.5kg (5-5.5lb) and ducks 2.0-2.3kg (4.5-5lb).