Common ostrich
Common ostriches usually weigh from , or as much as two adult humans. The Masai ostriches of East Africa ("S. c. massaicus") averaged in males and in females, while the nominate subspecies, the North African ostrich ("S. c. camelus"), was found to average in unsexed adults. Exceptional male ostriches (in the nominate subspecies) can weigh up to . At sexual maturity (two to four years), male common ostriches can be from in height, while female common ostriches range from tall. New chicks are fawn in colour, with dark brown spots. During the first year of life, chicks grow at about per month. At one year of age, common ostriches weigh approximately . Their lifespan is up to 40–45 years.
Screech owl
Screech owls are restricted to the Americas. Some species formerly placed with them are nowadays considered more distinct (see below for details). The common name "screech owl" is sometimes used for the not closely related barn owl as well.
Similar to other owls, the screech owl females are larger than the males of their species. They have a compact size and shape. The screech owls are small and agile. They are about 7 to 10 inches tall and have a wingspan of about 18 to 24 inches. They have prominent, wide-set feather tufts with bright yellow/green eyes. They have different brownish hues with whitish, patterned underside. This coloration helps them get camouflage against the tree bark.