National Geographic : 1954 Feb
Fierce and Lethal Eagle Is One of the Tenderest Mothers February finds the golden eagle family building or refur bishing an eyrie. Hen and cock work together bringing in heavy sticks for nest founda tion and heather and rushes for lining. Over the years a nest grows to enormous size. One Scottish eyrie in a pine tree attained 20 feet in height and 6 feet in diameter. Eggs arrive about the end of March. Mother normally does the brooding. Father supplies food and stands guard during the 5-to-6-week in cubation. He is an occasional baby sitter. + Baby Gets a Snack of Grouse Liver Growing, the youngster will accept tougher meat contain ing fur and feathers. At seven weeks he will pick almost any carcass to pieces, although mother still feeds him at times. By 11 weeks he will be fully feathered and ready to fly from the eyrie.