Nesting instinct. Nesting behaviour refers to an instinct or urge in pregnant animals caused by the increase of estradiol (E2) to prepare a home for the upcoming newborn(s). It is found in a variety of animals such as birds, fish, squirrels, mice and pigs as well as humans.
Nest, eggs and young. Like the Osprey and the Bald Eagle, the Golden Eagle is a champion nest-builder, at least in terms of size. Golden Eagles construct a huge platform of sticks, which they line, or pad, with thinner branches and even hair and grasses.hese large birds sometimes build their nests in trees or might use man-made structures, such as an electricity pylon. In Alaska, some Golden Eagles were documented nesting on the ground., but most often they nest on large ledges on cliff faces. Golden Eagles may use the same nest over many breeding seasons.
Eagle Species. There are more than 60 species of eagle, but only two live in North America, and they are the largest: the bald eagle and golden eagle. An average nest is about 5 to 6 feet and can grow as large as 12 feet in diameter and weigh in at more than 2 tons.The size of the nest increases with the size of the bird, with the bald eagle and the golden eagle building the biggest nests among eagles.agles are amazing birds for several reasons, and the size of their nests is just one. Another is their surprising and wondrous courtship -- an incredible ritual to witness. Once a mating pair is established, the business of building a nest begins in earnest.