The Large White can be confused with the Small White (Pieris rapae) and the Southern Small White but besides being larger, the black patch on the tip of the wing of the Large White spreads out to about half way down the wing margin whereas on the Southern Small White it spreads out a shorter distance and on the Small White this patch is only limited to the tip of the wing.

As with the Small Whites, Southern Small Whites and Green-veined Whites (Pieris napi), males have a single spot (often no spot at all) on the upperwing while females have two.

Brownsea Island, Dorset, England, 8 August 2009