Hays Eagles Mom s Feather Water Repellency study 2022 02 17 9:39am

The water repellant nature of the feather
the barbs and barbules of the feathers zip together and the little grooves between these helps direct water off the feather The preen gland oils keep the barbs and the barbules in top condition so they can be preened together and make a fairly water-resistant raincoat