Most birds shed their underside fea

Most birds shed their underside feathers during the nesting or brooding season. The patch of featherless skin is called a brood patch. That part of the skin is supplied with blood vessels to allow for heat transfer from the skin to the eggs during incubation.

Results (Chinese) 1:

大多数鸟类在筑巢育雏或脱落的季节其底羽毛。羽毛的皮肤贴片被称为育雏补丁。皮肤的那一部分与血管供应，以允许温育期间从皮肤的热传递到鸡蛋。

Results (Chinese) 2:

大多数鸟类在筑巢或育雏季节脱落下侧羽毛。无羽毛皮肤的补丁被称为育雏片。皮肤的这一部分提供血管，允许在孵育期间从皮肤到鸡蛋的热传递。

Results (Chinese) 3:

大多数鸟类在筑巢或育雏季节会脱落下侧的羽毛。没有羽毛的皮肤被称为育儿斑。皮肤的那一部分有血管供应，以便在孵化期间从皮肤向卵子传热。