Cape white-eyes are small passerines that measure up to 12 cm in length and weigh about 9.15 g. These birds have rounded wings with a wingspan of 7 cm. Cape white-eyes' plumage is greenish yellow on the upper portions of the body with a gray upper back while the throat is a bright yellow. Their belly is usually a peach color and the most distinguishing feature is the white ring around their eyes. They go through no seasonal plumage color change. These birds feature black, short decurved beaks which aid in gathering nectar. The legs are either gray to brown or pink depending on age. Older birds and fledglings maintain a pinkish shade while first-years have grayish-brown coloration. Cape white-eyes are sexually monomorphic.
Some subspecies exhibit plumage differences, mainly in coloration of breast and belly. (Z. p. virens) and (Z. p. caniviridis) have a greenish-yellow breast and belly while (Z. p. atmorii) and (Z. p. capensis) have a gray coloration. (Z. p. pallidus) and (Z. p. sundevalli) feature a pale yellow belly with peach-colored flanks.
Average mass: 9.15 g.
Average length: 12 cm.
Average wingspan: 7 cm.
Other Physical Features: endothermic ; homoiothermic; bilateral symmetry
Sexual Dimorphism: sexes alike
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