Your Constitution modifier increases by 2, and you can choose for your Dexterity or your Charisma modifier to increase by 1.

Ailurids' maturity is somewhat difficult to determine from an outsider, though in truth they do mature at roughly the same rate as humans.

Newborn ailurids are very small, and are covered in grey to white fur. Initially blind and deaf, their their ears and eyes open after roughly the first month.

By year 2, their fur begins to show it's distinctive color. From year 2 to about year 10, the fur color changes from a light silver-gold to a shimmering red gold.

At age 16, the full color and patterns are present, and they've mostly reached the height they'll be for the rest of their adult lives.

Though they develop similarly to humans, they are relatively long lived. It's not unheard of for ailurid elders to reach upwards of 300 years old.

Ailurids tend towards neutral alignments. Many Ailurids prefer a quiet, solitary life in their icy mountain homes, but may be swayed by pure curiosity to venture out into the world.

Though they may make selfless decisions and work for the greater good, it's not uncommon for an Ailurid to become overwhelmed and attempt to escape to a safer, more secluded area, usually from a higher vantage point (a tree, a tall rock formation with cover, etc).

Some Ailurids may, however, prefer self preservation above all else, and remain solitary and self-serving.

Ailurid society does not have strict rules nor specific religious doctrine, however breaking certain social taboos can be looked down upon.

Ailurids are smaller on average than humans, and usually a little more stocky. Your size is medium.

Additionally, they are rarely slender, and often are noticeably chubby. You can weigh between 100 and 200 pounds on average.

Life in the trees makes walking on the ground a bit difficult. Your base walking speed is 25 feet.

You can speak Common, Ailurid, and a third language of your choice.

You have retractable claws on your hands and feet. Because of your claws, you have a climbing speed of 20 feet.

In addition, your claws are natural weapons, which you can use to make unarmed strikes. If you hit with them, you deal slashing damage equal to 1d4 + your Strength modifier, instead of the bludgeoning damage normal for an unarmed strike.

Arboreal life has adapted your feet to be able to rotate in a way that gives you an incredible grip when climbing trees.

As long as you are barefoot, or otherwise your feet are unencumbered enough to grasp with your claws, you have advantage on all skill checks affecting climbing on or remaining stable on trees and other plantlife analogous to trees.

Your body is naturally adept at handling the cold mountain forests of your homeland. You suffer no ill effects from cold weather or cold terrain, and you gain resistance to cold damage.

Ailurid are surprisingly hardy, and can survive fairly well in harsh conditions by natural instinct. You have proficiency in the Survival skill.

Ailurid enjoy spending time alone. Even in their homelands, Ailurid spend much of their time isolated from their neighbors, either out in the trees or in their homes. As a result, they have a great deal of time for hobbies or educational endeavors.

You gain proficiency in two skills or tools. Additionally, <some per-rest ability that works thematically here, such that resting or being isolated in some way gives them a benefit maybe?>