Hays Eagles Mom Working on Brood Patch Feathers Falling 2023 02 10 8:03:32AM

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The incubation (brood) patch begins to develop on the breast or abdomen shortly before the female lays her eggs through hormonal changes that cause the feathers that cover that area to fall out on their own. Brood patch size varies by individuals within a species and in studies the size of the brood patch did not correlate with the size of the clutch