11Possums and opossums
Possums and opossums are different animals and that the spellings shouldn't be used interchangeably.
Cows, being social animals,can actually recognise each other based on facial features, which is an ability attributed only to a low number of species.
Pigs are smarter than any other domestic animal and they are considered by animal experts to be more trainable than dogs or cats.
Hippos can sleep underwater using a reflex that allows them to bob up, take a breath, and sink back down without waking up.
The gopher tortoise is a species of turtle native to the southeastern United States. The gopher tortoise is seen as a keystone species because it digs deep burrows that provide shelter for at least 360 other animal species, often preserving their lives during forest fires.
16Spinifex Hopping Mouse
The Spinifex Hopping Mouse has one of the most efficient kidneys of any animal and creates its own water through metabolic processes. They produce solid urine with very little water.
Goats have horizontal, slit-shaped pupils. Because goats' irises are usually pale, their contrasting pupils are much more noticeable than in animals such as cattle, deer, most horses, and many sheep.
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18Golden Poison Frog
Golden Poison Frog is one of the most toxic animals on Earth. It can kill 10 adult humans with just 1mg of its poison. Interestingly Golden Poison frogs raised in captivity and isolated from insects in their native habitat never develop venom.
There is a rare breed of pig called sheep-pig, which is capable of producing wool, just like sheep. There are many variations of these animals, the Mangalica is one of the most common breeds.
Giraffes can run extremely fast. At a gallop, they reach a speed of up to 60 km/h, which ranks them among the fastest animals in the savanna, right after the representatives of the cat family.