You are modeled after a particular kind of avian creature, and the resemblance is uncanny. On first glance you are indistinguishable from a small or tiny avian creature of your choice (potential forms include small birds, bats, or particularly large flying insects). Observers can distinguish you from a real animal on physical contact, having a passive perception above 17, or succeeding an DC17 check on Animal Handling, Perception, or Investigation.

Your Dexterity score increases by 2, your Strength score decreases by 1, and two other ability scores of your choice increase by 1.

Your height and weight are both of your choosing, but must fall within the normal ranges for the small/tiny avian creature you have chosen to resemble.

Your base walking speed is 30 feet, and your base flying speed is 60 feet.

You can fly at a speed of 60 feet, and at a maximum height of 90 feet, for up to 60 cumulative minutes per short or long rest.

While flying you forfeit your bonus action.

• You have advantage on saving throws against being poisoned, and you have resistance to poison damage
• You do not need to eat, drink, or breathe
• You are immune to disease, though necrotic damage may make your facsimile less convincing
• You don't need to sleep, and magic can't put you to sleep

Most Warforged take comfort in order and discipline, tending toward law and neutrality. But some have absorbed the morality – or lack thereof – of the beings with which they served.

When you take a rest, you must spend at least one or six hours (for a short or long rest respectively) in an inactive, motionless state, rather than sleeping. In this state, you appear inert, but it doesn’t render you unconscious, and you can see and hear as normal.

You may rest while perched atop an object or friendly creature, even if said perch is moving, so long as your rest is not interrupted.

• You gain a +2 bonus to Armor Class
• You can only don armor with which you have proficiency, and the total weight of donned armor cannot exceed ten pounds. To don armor, you must incorporate it into your body over the course of 1 hour, during which you must remain in contact with the armor. To doff armor, you must spend 1 hour remove it.  You can rest while donning or doffing armor in this way.
• Your armor cannot be forcibly removed from you while you live.

Your melee attacks deal 1D4 piercing damage as you rake, peck, bite, or sting the target.

While attempting to wield a weapon that is two handed or weighs more than fifteen pounds, attack with disadvantage.

You gain one skill proficiency and one tool proficiency of your choice.

You can speak, read, and write Common and one other language of your choice.
You may also mimic the noises made by your chosen animal form, though you do not comprehend them.