Noctossum

Noctossumis a nocturnal flying creature.

## Appearance

Noctossum is a six-legged jet-black thin creature, with limbs for walking and running and a pair of membranous wings, without any hair, and a pair of all-black eyes distributed on both sides watching everything around.

The average nightbone is 6.6 feet tall (about 200 centimeters), but weighs an average of only 80 kilograms.

## Physiology

noctossum are creatures without any fat, which makes their skin close to the muscles, while their high-strength muscles are extremely slender, which makes the nocturnal bones look like a walking skeleton. It is worth noting that the skull of Yebone is an exoskeleton, and the skull is only wrapped by periosteum without any skin. The limbs of the night bones are like slender sticks, and they can pass through narrow tree trunks, rock roads or canyons through this slender body. The hooves of the night bones are actually extensions of the bones, but there are not many nerves in them. As long as the wear and tear is not too severe, it will generally not make the night bones lose their mobility, but can help them trim and smooth.

The waist of the night bones is mostly about 6 inches (15cm), which is almost the diameter of the spine. Most of their internal organs are distributed in the chest cavity. The only intestines, nerves, and blood vessels that connect the lower hips pass through the center of the spine. These structures and The spinal cord in the lower back squeezes together. The slender waist gives noctossum great flexibility and mobility.

The bones of nightbones are hollow, which helps them stay airborne. noctossums have the ability to fly short distances. Their wingspan is huge, and they sometimes spread their wings to intimidate enemies or court mates.

noctossums are omnivores, but most of the time they eat vegetation, preying on small organisms just for certain trace elements. Bone beaks can help them pry open hard fruit or the skulls of other creatures.

noctossums have exceptionally sensitive perception, their eyes can perceive the infrared spectrum, and their ear canals can hear the tiniest air tremors. noctossums only come out at night and rest on the treetops during the day, and their black skin makes them blend with some dark tree trunks.

noctossums are hermaphrodites, they have a fixed estrus period, they look for a mate and mate during the estrus period, and the female noctossums give birth after 6 months of pregnancy, which is actually premature for young big bones, but the night bones are narrow The pelvis makes it a last resort. Thestral's only large organ growing in the lower abdomen is the uterus, which is so receded that when pregnant the young hang like precarious tumors around the reproductive tract.

## Society

noctossums generally live in forests of all types of night, from hot to cold, and from wet to dry. Many humanoids use nightbones as vehicles, but nightbones cannot actually fly for long periods of time.

noctossums are generally solitary, but sometimes form families temporarily in order to raise offspring. Their curious nature and flexible mobility make them always fly in the air or hide in the shadows to quietly observe the behavior of other races.

## Subspecies

* albino night bone
* Chilling noctossums (these nightbones that live in boreal forests and tundra are covered with white fuzz and look much larger than other nightbones)
* Rainforest night bones (distributed in the rainforest night bones, black skin revealed a trace of dark green spots)
* Marsh nightbone (a smaller subspecies of nightbone found in hot, humid wetlands and swamps)
* Jungle noctossum (the most common nightbone, found in warm forest areas)

## Evolution

noctossum has been shown to have evolved from a small, nocturnal, long-distance flying creature that appears to be related to many birds.