Hatching begins when the chick hammers a hole in the egg with a special “egg tooth” on the end of its beak. The bird makes a neat cut all the way around the egg, essentially cutting off the large end of the egg. This process may take up to 48 hours and requires a great deal of energy.

A newly hatched falcon chick weighs about one and a half ounces (60 grams) and is virtually blind. Covered only with a light coat of fluffy white down, it requires constant brooding by the female in order to stay warm. Obtaining energy from the small remnant of the egg yolk, now neatly tucked away inside its body, the newly hatched eyas isn’t usually fed by the parents for about 24 hours.

Feeding commences on day two, when the young falcon gapes and bobs its head around in search of small pieces of meat delicately provided by the female. She elicits their food-begging and feeding behavior by evoking a sharp “eeechup” call as she approaches the brood with food.