Chestnut-flanked White-eye, no subspecies.
Chestnut-flanked White-eye often moves alone, in pairs or in small groups. They like to move in groups during the migration season and winter, sometimes with up to 50-60 birds. It shuttles and jumps between branches and flowers in secondary forests and shrubs, or flies from one tree to another. Sometimes it circles around branches or suspends on flowers by rapidly vibrating its wings, making a faint "hissing" sound when it moves.
The breeding season of red-flanked white-eye is from April to July, and some start nesting as early as March. Nests are built on broad-leaved or coniferous trees and shrubs. The nests are in the shape of hanging baskets or cups, mainly composed of grass stems, grass leaves, mosses, bark, spider silk, kapok fluff, etc., and are padded with palm silk, feathers, fine roots, grass stems, wool, etc. The nests are mostly suspended on the ends of thin side branches or branches, surrounded by dense branches and leaves, and are not easy to find. The height is 1-10 meters from the ground. The outer diameter of the nest is 6.0-7.5 cm, the inner diameter is 4-5.8 cm, the height is 4-6 cm, and the depth is 2.7-4.6 cm. Reproduce 1-2 nests per year. Each nest lays 3-4 eggs, mostly 3. The eggs are light blue-green or white.
Listed in the "Red List of Endangered Species of the World Conservation Union" (IUCN) 2016 ver 3.1-Least Concern (LC).
Listed in the "National List of Terrestrial Wildlife with Important Economic and Scientific Research Value" (Item 631) issued by the State Forestry Administration on August 1, 2000.
Listed in the second level of China's "National Key Protected Wildlife List" (February 5, 2021).
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