All living things, from tiny cyanobacteria to giant blue whales , need water to survive. Without water, life as we know it would not exist. And life exists wherever there is water. All organisms, like animals and plants, use water: salty or fresh, hot or cold, plenty of water or almost no water at all.
Note: There are some animals that can survive without water for years but the kangaroo/desert rat is the only animal that can survive without water throughout their life.
Their bodies have developed amazing adaptations that reduce the amount of water needed and the amount of water that is lost. Even though their diet consists of mostly dry seeds, the Kangaroo rat has almost no need for water. Instead they survive almost entirely on the water metabolized from seeds that are eaten.
Koalas rarely drink water
Each day, wild koalas eat around 510 grams of fresh succulent eucalyptus leaves, and the water in the foliage they feed on is believed to contribute about three quarters of their water intake in both summer and winter.
As well as getting water through osmosis, saltwater fish need to purposefully drink water in order to get enough into their systems. Where their freshwater counterparts direct all of the water that comes into their mouths out through their gills, saltwater fish direct some into their digestive tract.
'Koala' is thought to have meant 'no drink' in one of the Aboriginal languages. Koalas don't need to drink very often because they get most of the moisture they need from eucalyptus leaves.
Rodents on pelleted diet consume most of their water immediately before and after they eat food, which is probably due to both osmotic and volumetric stimulation of thirst (Kraly, 1984). Thus, mice that eat more would tend also to drink more.
A kangaroo would win a fight against a human being.
In the wild, a kangaroo will try to grasp their prey and then tear into it with the claws on its feet. This will inflict devastating wounds on a human being or even disembowel them. Without weapons and armor, humans are fragile to these wild animals.
Kangaroos are grass eaters that live in grasslands that can be very dry with little rainfall. They may be able to go several months without water because they are capable of getting water from the food they eat.
Mountain gorillas generally obtain sufficient quantities of water from the vegetation they consume and they rarely drink water (Schaller, 1963).
Orphaned macropod joeys need to be fed a special milk formula according to their growth stage. Macropod joeys should never be fed regular cow's milk as lactose will cause diarrhoea, slow their growth and may cause death.
Similarly, the red kangaroo can produce two different kinds of milk, depending on the age of the young (Griffiths, McIntosh & Leckie, 1972). One gland can produce a fluid rich in protein for a neonate and the other “mature” milk for a young at foot (Griffiths, McIntosh & Leckie, 1972).
Seahorses and their close relatives, sea dragons, are the only species in which the male gets pregnant and gives birth. Male seahorses and sea dragons get pregnant and bear young—a unique adaptation in the animal kingdom.
The 'immortal' jellyfish, Turritopsis dohrnii
To date, there's only one species that has been called 'biologically immortal': the jellyfish Turritopsis dohrnii. These small, transparent animals hang out in oceans around the world and can turn back time by reverting to an earlier stage of their life cycle.
Obligate anaerobes like Peptostreptococcus, Treponema, Fusiform, Porphyromonas, Veillonella and Actinomyces can live without oxygen.
A gorilla would win a fight against a kangaroo.
The kangaroo, without access to its powerful leg kicks, would be helpless to stop the assault of the gorilla as it lands powerful bites, strong thumps, and bone-breaking thrashings on the marsupial.
No, an unarmed human being could not beat a gorilla in a fight. Simply put, gorillas are far too strong for human beings to overcome. If the human sees the gorilla first, the best the human could hope for is finding a nearby place to hide. When threatened, gorillas have viciously thrashed and mauled humans.
If you change the question to: “Can a single, average-sized, athletic man armed with a primitive spear and minimal training defeat a lion, tiger, or bear in a fight?” the answer would be yes. He can, but it's certainly not assured. A tremendous amount of luck would be required. It's unlikely.
to eliminate sources of food, shelter, and water. Denied food, rats will turn to killing and eating each other, further reducing the infestation. Rats cannot live without food, water, or shelter.
For example, if mice smell cat urine, mice are likely to leave the area to avoid the predator. Stowers discovered that pheromones travel through the mouse nose to the brain, where the pheromones will interact with neurons which stimulate emotions. In this case, it's the smell of cats that sparks fear in mice.
Paper products, whether it's toilet paper, writing paper, wrapping paper, etc. are attractive to mice. It's not because they want to eat it but because they want to use it as nesting material. They do this with cloth, too.
Koalas as a resource
For some First Nations, the hunting and eating of koalas was forbidden due to their spiritual significance. Many stories describe the koala's importance in the supply and safeguarding of water, encouraging protection over consumption.
In keeping with our ethos to give something back, part of the profit from this special beer goes to support wildlife and habitat conservation of Phillip Island's is renowned colony of koalas.
No. Koalas eat only from a few kinds of eucalyptus trees.