SPECIES

Heuglin's White-eye Zosterops poliogastrus Scientific name definitions

Natalia C. García, Bas van Balen, Josep del Hoyo, Nigel Collar, and Guy M. Kirwan
Version: 2.0 — Published May 20, 2022

Plumages, Molts, and Structure

Plumages

These descriptions refer to the nominate subspecies; the other two subspecies are described under Systematics: Geographic Variation.

Juvenile

Immature birds resemble adults.

Adult

Adult has a distinct yellow forehead and forecrown extending to between the eyes, a white eye-ring 1–2 mm wide, and a narrow black line through lores and lower front edge of eye-ring. The crown and upperparts are green; the tail is dark brown with narrow green outer edges. The flight feathers and primary coverts are blackish brown, edged green to yellowish green.The chin and throat are yellow , breast-sides and band across upper breast are pale gray, flanks are grayish buff, the center of breast and belly are white, sometimes tinged yellow, while the thighs and undertail coverts are yellow. The axillaries are pale yellow, and underwing coverts are white with yellow tinge. Males and females look alike.

Molts

No information available.

Bare Parts

Bill

Black.

Iris and Facial Skin

Brown or hazel.

Tarsi and Toes

Legs slate to pale gray.

Measurements

Linear Measurements

Wing length

  • Zosterops poliogastrus poliogastrus: 63.9 mm (range 58–69, n = 54, from eastern Ethiopia highlands except extreme south); 61.5 mm (range 59–63, n = 11, from the extreme south of Eastern Ethiopia highlands) (2).
  • Zosterops poliogastrus kaffensis: 60 mm (range 57–63, n = 29) (2).
  • Zosterops poliogastrus kulalensis: 62.7 mm (range 61–64, n = 8) (2); range 62–65 mm (n = 8 males and 3 females), type specimen: adult male 64 mm (3).

Tail length

  • Zosterops poliogastrus poliogastrus: 48.4 (range 43–53, n = 54, from eastern Ethiopia highlands except extreme south); 47.3 (range 46–49, n = 11, from the extreme south of Eastern Ethiopia highlands) (2).
  • Zosterops poliogastrus kaffensis: 45.1 mm mm (range 41–48, n = 29) (2).
  • Zosterops poliogastrus kulalensis: 46.5 mm (range 45–51, n = 8) (2); type specimen, adult male: 48 mm (3).

Beak length

  • Zosterops poliogastrus poliogastrus: 14.1 mm (range 13–15, n = 54, from Eastern Ethiopia highlands except extreme south); 14.1 mm (range 13–15, n = 11, from the extreme south of Eastern Ethiopia highlands) (2).
  • Zosterops poliogastrus kaffensis: 14 mm (range 13–15, n = 29) (2).
  • Zosterops poliogastrus kulalensis: 15.4 mm (range 14–16, n = 8) (2); type specimen, adult male, culmen from base: 15 mm (3).

Mass

Zosterops poliogastrus kulalensis: male 11 g (n = 1), female 13 g (n = 1) (4)

Recommended Citation

García, N. C., B. van Balen, J. del Hoyo, N. Collar, and G. M. Kirwan (2022). Heuglin's White-eye (Zosterops poliogastrus), version 2.0. In Birds of the World (S. M. Billerman and B. K. Keeney, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.heuwhe2.02