The great horned owl is one of the first bird species to nest each year. They are often on the nest beginning at the end of January. Great horns do not make a nest, they borrow a nest from another bird that has not yet returned from their winter migration. Typically they will use a nest from another large bird such as a hawk, heron or crows. They may also use a tree hollow or a squirrel's nest, if they are desperate. Clutch sizes vary from 1 to 4 eggs. The female incubates the eggs which take 4 to 5 weeks to hatch. The female continues to sit on the nest after the eggs hatch to keep the bald and helpless chicks warm. As the chicks grow and are able to keep themselves warm the female will join the male in hunting for the family laving the chicks alone. At around 5 weeks of age the chicks begin to get adventurous and start branching, climbing along the tree branches of the nesting tree. It is not unusual that a chick may fall out of the tree at this age. The parents will continue to watch over and feed the chick on the ground until the chick can climb back up into the tree. Unfortunately this is when people often find the chick on the ground. Often they will take the chick home, usually out of concern, but they are not a good substitute for the chicks real parent and during this developmental stage of the chicks life they can really mess them up. It is called human imprinting and it usually leads to an owl that can no longer survive on their own in the wild. SO what should you do if you find a chick? If the chick does not appear injured or in danger the best thing to do is leave it for its parents to care for. If it looks like the chick is hurt or in danger, especially from domestic cats or dogs, then you should take it to a facility that cares for injured raptors or birds.