If pills are taken every day at the same time, and each pack is started on time, oral contraceptives are 99% effective in preventing pregnancy. On average, oral contraceptives are 93-97% effective because women often miss pills or do not start a new pack on time.
Kangaroos are large marsupials that are found only in Australia. They are identified by their muscular tails, strong back legs, large feet, short fur and long, pointed ears.angaroos are the only large animals that hop as a primary means of locomotion. Their springy hind legs and feet are much stronger and larger than their arms (or forelimbs). According to the San Diego Zoo, kangaroos can cover 15 feet (7 m) in a single hop and can hop as fast as 30 mph (48 kph).
Large Kangaroos. There are 6 species of large kangaroo, the red kangaroo being the most common, as well as being the only one that is restricted to the arid zone, inhabiting the better watered plains and low open woodlands, with its heartland in western New South Wales.n this part of its range there are 2 closely related species, the antilopine wallaroo and the black wallaroo. It is believed the populations of the euros and wallaroos are probably similar to that of red kangaroo, though they haven't been estimated (Edwards, 1989).