 It is an impressionistic pattern fished successfully during caddis hatches and spinner falls.The Partridge and Orange is traditionally a trout and grayling pattern but may be used for other aquatic insect feeding species.Soft-hackled flies as they are known today and in particular "The Partridge and Orange" originated in the north country of England and were first described by Joseph Wells in his 1842 publication THE CONTEMPLATIVE ANGLER.