Hays Eaglets H14 H13 pin feather study 2021 04 19 1123AM

Pin feathers are new feathers that are in the process of growing. They are at times called blood feathers because they are still connected to the blood supply and this connection is what fuels their growth

In this view we can clearly see the separation between the joint of the 'hand' of the wing and the forearm the 'hand' of the wing contains the 10 primary flight feathers.
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