Identification: Occurs in a variety of colour morphs but all have feet of the distinctive red color which gives them their name. Adult white morph has mostly white plumage with contrasting black flight feathers while the brown form has dark greyish brown plumage with darker flight feathers and light bluish-grey bill/facial skin. Adult of the intermediate form resembles white morph but has brown mantle, back and wing-coverts. Juvenile brown morph resembles adult but has dark grey bill and purplish facial skin. Immature white morph often shows diffuse darker breast-band and untidy whitish area on wing coverts.