how many chicks do red tail hawks have
Red-tailed hawk A clutch of one to three eggs is laid in March or April, depending upon latitude. Clutch size depends almost exclusively on the availability of prey for the adults. Eggs are laid approximately every other day. The eggs are usually about 60 mm × 47 mm (2.4 in × 1.9 in). They are incubated primarily by female, with the male substituting when the female leaves to hunt or merely stretch her wings. The male brings most food to the female while she incubates. After 28 to 35 days, the eggs hatch over 2 to 4 days; the nestlings are altricial at hatching. The female broods them while the male provides most of the food to the female and the young, which are known as eyasses (pronounced "EYE-ess-ez"). The female feeds the eyasses after tearing the food into small pieces. After 42 to 46 days, the eyasses begin to leave the nest. The fledging period follows, with short flights engaged in, after another 3 weeks. About 6 to 7 weeks after fledging, the young begin to capture their own prey. Shortly thereafter, when the young are around 4 months of age, they become independent of their parents. However, the hawks do not generally reach breeding maturity until they are around 3 years of age. In the wild, red-tailed hawks have lived for at least 25 years, for example, Pale Male was born in 1990, and in Spring 2014 is still raising eyasses. The oldest captive hawk of this species was at least 29 and a half years of age.[5]
Golden eagle Golden eagles usually mate for life. A breeding pair is formed in a courtship display. This courtship includes undulating displays by both in the pair, with the male bird picking up a piece of rock or a small stick, and dropping it only to enter into a steep dive and catch it in mid-air, repeating the maneuver 3 or more times. The female takes a clump of earth and drops and catches it in the same fashion.[2][48] Golden eagles typically build several eyries within their territory (preferring cliffs) and use them alternately for several years. Their nesting areas are characterized by the extreme regularity of the nest spacing.[92] Mating and egg-laying timing for golden eagle is variable depending on the locality. Copulation normally lasts 10–20 seconds. Mating seems to occur around 40–46 days before the initial egg-laying.[2] The golden eagle chick may be heard from within the egg 15 hours before it begins hatching. After the first chip is broken off of the egg, there is no activity for around 27 hours. After this period, the hatching activity accelerates and the shell is broken apart in 35 hours. The chick is completely free in 37 hours.[24] In the first 10 days, chicks mainly lie down on the nest substrate.[24] The eagles are capable of preening on their second day but are continually thermoregulated via brooding by their parents until around 20 days.[2] Within 10 days, the hatchlings grow considerably, weighing around 500 g (1.1 lb).[93] Around this age, they also start sitting up more.[24] Around 20 days of age, the chicks generally start standing, which becomes the main position over the course of the next 40 days.[24] The whitish down continues until around 25 days of age, at which point it is gradually replaced by dark contour feathers that eclipse the down and the birds attain a general piebald appearance.[2] After hatching, 80% of food items and 90% of food biomass is captured and brought to the nest by the adult male. Fledging occurs at 66 to 75 days of age in Idaho and 70 to 81 days in Scotland. The first attempted flight departure after fledging can be abrupt, with the young jumping off and using a series of short, stiff wing-beats to glide downward or being blown out of nest while wing-flapping. 18 to 20 days after first fledging, the young eagles will take their first circling flight, but they cannot gain height as efficiently as their parents until approximately 60 days after fledging. In Cumbria, young golden eagles were first seen hunting large prey 59 days after fledging. 75 to 85 days after fledging, the young were largely independent of parents. Generally, breeding success seems to be greatest where prey is available in abundance.[2]