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).
There are various species of these, such as the Musky rat-kangaroo and the Rufous rat-kangaroo. Rat kangaroos are different to the kangaroo-rats of North America, and not at all related.Potoroos, which are small and quite endangered. The Western Grey Kangaroo (Macropus fuliginosus) - This species is found in the southern part of west Australia, near the coast of South Australia and the Darling River basin. 2  The Antilopine Kangaroo (Macropus antilopinus) - This species is found in the far north of Australia.