appearance colored colors coloured colours compare comparison cooking culinary cultivars dicotyledonous edible enormous food gigantic golden-sweet-potato healthy herbaceous-perennial-vine ipomoea-batatas kūmara kūmera large nutritional nutritious plant popular purple raw root root-vegetable shape shapes size Sizes skin-colours skins starchy surface surfaces sweet-potato sweet-potatoes texture textures tuber tuberous uncooked varieties vegetable vine AEWA animal anticipate Ardea modesta Ardeidae beak beautiful beauty bird birding birds cuk cuk cuk Eastern Great Egret egret eye feather female forage garden great green Heron India krayker kōtuku leaf life marine migratory nature nest nesting outdoor peace preen quiet rest spring stand summer tail wader water wetland white wildlife wing