It averages somewhat larger than the sympatric race A. h .
The great white heron differs from other great blues in bill morphology , head plume length , and in having a total lack of pigment in its plumage .
heron averages somewhat larger than the sympatric race A. h .
The great white heron differs from other great blues in bill morphology , head plume length , and in having a total lack of pigment in its plumage .