The kangaroo /kru/ is a marsupial from the family Macropodidae (macropods, meaning 'large foot').
Kangaroos are endemic to Australia. As with all marsupials, the young are born at a very early stage of
developmentafter a gestation of 3136 days. At this stage, only the forelimbs are somewhat developed, to allow
the newborn to climb to the pouch and attach to a teat.
Horse is a viviparous animal that gives birth to its young. Gestation lasts approximately
340 days, with an average range 320370 days,[49] and usually results in one foal; twins are rare.[50] Horses are
a precocial species, and foals are capable of standing and running within a short time following birth. [51] Foals are
usually born in the spring.
HORSE
The tiger is the largest in the cat species. Tigers are the most variable in size of all big cats, much more so
than lions. Mating can occur all year round, but is more common between November and April. The litter is usually
two or three cubs, occasionally as few as one or as many as six. Cubs weigh from 680 to 1,400 g (1.50 to 3.09 lb)
each at birth, and are born blind and helpless.[53] The females rear them alone, with the birth site and maternal den
in a sheltered location such as a thicket, cave or rocky crevice.
PENGUIN is an oviparous animal that lay eggs.
Penguins are an order of flightless birds living in the southern hemisphere.
Although all penguin species are native to the southern hemisphere, they are not, contrary to popular belief, found only in
cold climates, such as Antarctica. With an adaptation for life in the water, penguins feature dark and white
plumage, and their wings have adapted into flippers. They feed on squid, fish, krill and other sealife forms that
penguins catch while swimming.
TIGER
The inside of a crocodile egg is a great place to develop, but after more than two months trapped in this small,
ovoid shell the fully developed embryo needs to get out fast before its oxygen demands become too great.
Hatching is actually a much more difficult task than you might imagine, but the baby crocodile has developed
ways to make the process easier. Crocodile eggs, unlike other reptile eggs, consist of a soft, inner membrane
and a hard, calcified outer membrane - very similar to a bird's egg. Breeding usually takes place during the dry
season (6) (7), though the exact timing varies with location (3). Mating takes place in the water. The nest is a hole,
up to 50 centimetres deep, dug by the female into a sandy bank, several metres from the water (2) (3) (6). The
female Nile crocodile is an attentive parent, and, after laying up to around 60 eggs, will cover the nest with sand
and guard it for the entire incubation period, around 90 days (2) (3) (4).
Frogs are a diverse and largely carnivorous group of short-bodied, tailless amphibians. Frogs typically lay
their eggs in water. The eggs hatch into aquatic larvae called tadpoles that have tails and internal gills. They have
highly specialized rasping mouth parts suitable for herbivorous, omnivorous or planktivorous diets. The life cycle is
completed when they metamorphose into adults. A few species deposit eggs on land or bypass the tadpole stage.
Adult frogs generally have a carnivorous diet consisting of small invertebrates, but omnivorous species exist and a
few feed on fruit. Frogs are extremely efficient at converting what they eat into body mass, which makes them an
important food source for predators. Frogs are a keystone group in the food web dynamics of many of the
world's ecosystems.
