Wombat. A shy native Australian animal, Wombat is a herbivorous marsupial rarely seen in the wild. With relatively large brains, they are the smartest of marsupials.
Marsupials are notably less intelligent than placental mammals, partly because of their simpler brains. Compared with that of placentals, the brain of marsupials differs markedly in both structure and bulk.
What at first glance might look like a typical house mouse is actually a native Australian carnivorous marsupial with a name you won't want to stop saying. Although it may look adorable, the Ningbing is a ferocious predator, emerging after dark to hunt and devour large insects and other invertebrates.
There is no particular reason to say that marsupials are, as a whole, less intelligent than the majority of mammals. Their level of intelligence varies from species to species, of course, but other quadruped mammal groups display the same variation.
Bottlenose Dolphins
Aside from humans, dolphins have the greatest brain-to-body ratio among animal species, including primates.
CHIMPANZEES. RECKONED to be the most-intelligent animals on the planet, chimps can manipulate the environment and their surroundings to help themselves and their community. They can work out how to use things as tools to get things done faster, and they have outsmarted people many a time.
Chimpanzees
We share 99 percent of our DNA with chimpanzees, so it comes as no surprise that countless hours of research have been dedicated to understanding the intelligence and behavior of our sister species. This research has firmly established that chimps are one of the most intelligent species on earth.
Not only did the researchers discover that koalas are cleverer than first thought, but that these experimental structures are working to keep them safe.
Opossums are inhibited animals, especially in daylight or under artificial light, but are by no means stupid. Results from some learning and discrimination tests rank opossums above dogs and more or less on a par with pigs in intelligence.
Most people think of Australia when they think of marsupials, because the most well known of the marsupials—koalas and kangaroos—live there. But opossums, which are also marsupials, live in North, Central, and South America.
Gilbert's potoroo or ngilkat (Potorous gilbertii) is Australia's most endangered marsupial, the rarest marsupial in the world, and one of the world's rarest critically endangered mammals, found in south-western Western Australia. It is a small nocturnal macropod that lives in small groups.
Male kalutas, small mouselike marsupials found in the arid regions of Northwestern Australia, are semelparous, meaning that shortly after they mate, they drop dead. This extreme reproductive strategy is rare among vertebrates —only a few dozen are known to reproduce in this fashion, and most of them are fish.
Said to be one of the most dangerous animals in Australia, the Saltwater Crocodile is an aggressive and territorial animal, and is the largest reptile in the world in terms of their mass – known to reach over 1000kg!
Unsurprisingly, chimpanzees are one of the most intelligent animals on this planet—next to humans, of course. Similar to how humans inherit their intelligence from their mother, a chimpanzee's intelligence also greatly relies on their genes.
Crows have long been considered cunning. But their intelligence may be far more advanced than we ever thought possible.
Echidnas are quite smart, though, having the biggest frontal cortex in relation to their body size of all mammals, including humans. They can climb, burrow and run rapidly. They are mostly solitary animals, but the rare times they are seen collectively is when they form “an echidna train”.
Despite all this, opossums actually excel in intelligence tests. In one study, scientists tested opossums' ability to remember where food had been hidden, and they scored even higher than cats, rats, dogs, and rabbits. In another study, opossums demonstrated that they can solve maze puzzles faster than cats and rats.
Pigs are gentle creatures with surprising intelligence. Studies have found they're smarter than dogs and even 3-year-old children! In the wild, pigs form small groups that typically include a few sows and their piglets.
What is anthropophobia? Anthropophobia is a fear of people. People with anthropophobia may avoid crowds, fear eye contact or worry that they are being judged. Anthropophobia is not a clinical disorder in the Diagnostic and Statistical Manual of Mental Disorders (DSM-5), but many people consider it a specific phobia.
Three-toed sloths are some of the slowest and seemingly laziest creatures in the world. Instead of evolving to eat more, they evolved to do less.
One of the leading killers of Australia's endearing koalas is a debilitating bacterial infection: chlamydia.
Physically, giraffes are quiet, extremely tall, have excellent eyesight and are considered very intelligent. The intelligence of giraffes is a factor in how quickly they adapt behaviourally in response to changing external stimuli.
The new research shows that dolphins have the longest memory yet known in any species other than people. Elephants and chimpanzees are thought to have similar abilities, but they haven't yet been tested, said study author Jason Bruck, an animal behaviorist at the University of Chicago.
The genetic DNA similarity between pigs and human beings is 98%. Interspecies organ transplant activities between humans and pigs have even taken place, called xenotransplants.
Anthropologists and other scientists have held that human intelligence crossed a threshold (a 'magical' rubicon) with the arrival of Homo sapiens , who replaced Homo erectus a million years ago. It was believed that Homo erectus was not intelligent enough to make anything more than crude stone tools.