Bear
Any bear can smell blood for miles, when the wind is stirring up in the right direction.
Sharks
Sharks know the difference between fish and human blood and, while they can smell our blood, it is not a scent they associate with food.
Snake
Although it has been demonstrated that snakes can sense menstruation, according to Breitweiser, a reptile's capacity to detect menstruation mostly depends on their sense of smell.
Dog
The noses of trained dogs are sensitive enough to identify cancer indicators in a person's breath, urine, and blood at very low quantities, as low as parts per trillion.
Kiwi
When kiwis probe the forest floor in search of food, they are guided by smell rather than sight.
Cow
Cows can smell blood from up to 5 miles away and hear low and high frequency sounds much better than humans can.
Rat
It is generally known that the smell of mammalian blood repels prey animals like mice and rats while attracting top predators like tigers and wolves.
Horse
Smell of blood and game carcass Some horses do not like the smell of blood or even seeing an elk carcass.
Lion
Predators such as Lions and Hyenas can scent blood or carcasses from a great distance away and combined with the sense of hearing they will choose to react to the scent.
Lion
Predators such as Lions and Hyenas can scent blood or carcasses from a great distance away and combined with the sense of hearing they will choose to react to the scent.
Wolves
A wolf's sense of smell, which is up to 100,000 times more acute than a human's, is even more remarkable. A wolf can detect scents up to 300 yards (or one mile) away under the correct circumstances.