A brood patch, also known as an incubation patch in older literature, is an area of featherless skin on the underside of birds that exists during the nesting season. Feathers act as inherent insulators and prevent efficient incubation, to which brood patches are the solution.
A brood patch, also known as an incubation patch in older literature, is an area of featherless skin on the underside of birds that exists during the nesting season. Feathers act as inherent insulators and prevent efficient incubation, to which brood patches are the solution.
Source: Wikipedia "Brood patch" · CC BY-SA 4.0
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