The Cervidae family includes deer, which is a wild mammal. It belongs to the Artiodactyla order, which provides for mammals with even toe hooves and two small and two large hooves on each foot. Reindeer, red deer, elk, white-tailed deer, and moose are just a few of the 50 species of deer. Deer originated in Asia, North America, Northern Africa, Europe, and South America and were then transported to nations like the Republic of South Africa, New Zealand, and Australia.
They also have one distinguishing feature that sets them apart from the rest of the ruminants: practically all deer species have antlers. These outgrowth structures grow from the head and do not contain Keratin as actual horns do. Deers flourish in woodland environments, especially those with tough conditions, which explains why they have powerful legs and compact, flexible bodies to help them survive.

Although some favour tundra and grassland biomes, their surroundings are typically green and forested. Deer comes in all shapes and sizes, with some enormous and others being little. The Southern Pudu is the smallest Pudu species, weighing around 9 kg and growing up to 14 inches tall when fully mature. The moose is the largest species, weighing up to 820 kilograms and standing 6.5 inches tall when fully grown.
Because of environmental challenges and numerous predators, deer are at a high risk of dying in their natural habitat. Even yet, deer can live anywhere from 10 to 25 years, depending on the species. Plants, leaves, fruits, nuts, grass, and acorns are among the foods consumed by deer. They are, therefore, herbivores.
Because of all of this information on deers, they may boast a plethora of fascinating facts. As a result, this essay aims to cover more than 30 deer facts.
1. The eyes of deer are located on the side of the head.
This provides deer with a 310-degree field of vision, making it nearly impossible for them to focus on a single place. They do, however, have excellent night vision, which is necessary for foraging and avoiding predators.
2. Deer have excellent hearing abilities.
Because of their muscles, deer can move their ears and make them face in different directions without moving their heads. It also detects sound frequencies that are higher than those heard by humans.
3. Excellent olfactory sense.
Their sensitivity to smell detects predators even at great distances. They lick their noises to keep them wet, which helps them retain odour and boost their smelling abilities.
4. Deer are gregarious animals who walk in groups called herds.
They might walk in sexes or under the leadership of a strong male. Male herds can keep an eye on female herds. Up to 100,000 people could be part of the herd.
5. Deers have unique communication methods.
Visually, audibly, and chemically, they communicate. They create ascent in many parts of their bodies, which gives them vital information about their body, sex, social status, and whether or whether there is danger in the area.
6. Deer practice both monogamy and polygamy.
Because most species’ breeding seasons are short, they exhibit various behaviours. For example, a male may occupy territory with one or more females, and multiple males may band together to protect a harem (female group), or wander to new herds hunting for mates.
7. During the spring season, some antlers grow.
Deer antlers are covered in velvet, which is a skin covering a lot of nerves and blood vessels, and they grow in temperate climates. Antlers are crucial for male deer, especially during mating season, as they help the male win female deer over. They shed when the antlers achieve maturity.
8. A deer’s gestation period ranges from 180 to 240 days.
A fawn is a deer’s young, and they can only have one or two offspring at a time, with three being extremely rare. Larger deer species refer to their young as calves. Within 10 minutes of birth, a fawn can stand on its own, and within seven hours, it can walk. This is a fantastic achievement.
9. Deer are available in a variety of colors.
Deer are either extremely light brown or very dark brown, and their young have patches that serve as a defense against predators.
10. Fawns don’t have a distinct odor.
Predators cannot detect the scent of fawns, making it easier to conceal them. Mothers stay with their fawns for up to two years while still feeding them, hiding them in safe places and feeding them up to six times a day.
11. Water deer in China do not have antlers.
They are the only deer species without antlers, instead displaying a set of very long canine teeth to seduce female companions.
12. The reindeer is the only domesticated deer.
The reindeer is the only tamed deer species that can coexist with humans. The majority of deer species spend their whole lives in the wild.
13. Some deer species are threatened with extinction.
The IUCN’s red list of endangered species includes the hog deer, Persian fallow deer, chinanteco deer, bawean deer, and calamian deer. The Pere David deer is only found in captivity since it no longer exists in the wild.
14. Deer play a vital role in the environment.
Many wild species, including humans, consider deer to be prey, making them a vital link in the food chain.
15. Deer antlers grow quickly.
The tissues of a deer’s antlers grow quicker than any other tissue on the earth.
16. The Irish elk was the largest deer species ever known.
It was 7 feet tall at the shoulder and had antlers that were 12 feet from tip to tip, making it the world’s largest known species. The last one died around 11, 000 years ago, making it extinct. The Pudu only grows to a height of 32cm.
17. Deer were shown in cave art.
Paleontologists discovered deer as part of the cave artwork. They have played a significant part in the caves’ history.

Other information about deer in other areas
18. Reindeer herders in Finland have been coating the antlers of their reindeer with reflective paint to reduce automobile accidents.
19. The Seneca Army Depot mistakenly encircled a rare species of white deer, putting the deer at risk of extinction due to its closing.
20. When their young are in distress, mammals’ young ask for aid in comparable ways. According to a Canadian study, mother deer can hear the cries of other young deer in danger, such as cats and dogs.
21. Some deer species have been caught on tape feeding young birds, which is strange because deer are primarily herbivores.
22. The key deer, North America’s tiniest deer, can swim between islands and is unafraid of humans due to their frequent encounters. However, they are in danger.
23. In Germany, despite being physically present for nearly two decades, there is a deer species that does not cross the Iron Curtain boundary.
24. In South Carolina, anyone who hit a deer with their car and donate the meat to a worthy cause receive tax relief.
25. In North America, deer are regarded as the most dangerous creature to humans.
26. Deer stuck in frozen lakes in Canada are rescued by a helicopter downdraft.
27. When a female deer is exposed to extreme conditions that cause malnutrition, it digests her pregnancy spontaneously.
By rubbing its antlers against the grass, a male red deer produces ejaculate.
29. In England, when the aircraft’s engine is shut down and the craft is stationary, hunters are allowed to shoot down deer from an airplane.
30. When a male deer’s testicles are removed, his antlers cease shedding and become extremely light. On the other hand, the velvet continues to grow on the ones that are already there.
31. Trees have a protective system in which they manufacture an excessive amount of acid in order to become bitter and dissuade deer from eating them, and they can detect deer saliva.
32. Deer are groomed and fed by macaque monkeys on the Japanese island of Yakushima. They, in turn, allow the monkeys to go from one location to another by riding on their backs.
33. In the late 1960s, a British woodsman built dentures out of a deer he had shot in order to eat it because he lacked teeth.
34. Deer are colorblind to neon orange, so hunters wear neon orange jackets to improve their chances of shooting a deer.
References:-
http://www.legislation.gov.uk/ukpga/1991/54/section/4
http://www.iwla-rh.org/html/DGIF_articles/deer_antlers.html
https://phys.org/news/2016-09-trees-roe-deer-saliva.html?scrlybrkr=3b4cb886
https://www.conserve-energy-future.com/facts-about-deer.php