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Physical Attributes
A male ostrich stands between 6 and 9 feet at maturity, while females will range between 5.5 and 6.5 feet tall at maturity. Ostrich chicks grow about 10 inches per month for the first year and weigh about 100 pounds at 12 months of age. Adults usually weigh between 150 to 330 pounds. Domesticated ostriches reach maturity at 2 to 3 years of age. Females mature about 6 months earlier than males. Ostriches normally live from 30 to 70 years in captivity.
Even though ostriches are flightless birds, their wings are surprisingly strong. Ostriches use their wings for aggressive display and courtship rituals. Males have contrasting bright white and black plumage. Females" plumage is grey and drab. Their lead-blue skin color usually becomes scarlet over the beak, on the forehead and around the eyes during the mating season. The normal body temperature range of the ostrich is between 103 and 104 degrees Fahrenheit. During hot weather ostriches lift and fan their wings, while during cold weather they cover their thighs with their wings. The ostrich is the only bird to have only two toes on each foot. Emus, rheas and cassowarys, which are also classified as ratites (flightless birds), have three toes on each foot. Ostriches are fast runners, and their first instinct upon being frightened is to run. Ostriches can cover between 16 to 23 feet per stride and maintain speeds between 30 and 50 miles per hour for 30 minutes.
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