Sounds like a cat? prolly it isn’t, I’m just going on the desert thing.
So yeah, it’s either a cat, or me.
Correct, burning_idle. Cat is the answer. 
w()()t! and such.
I can be caught but you won’t want to catch me
I am so small that you can’t even see me
I can be passed from person to person
What am I?
A cold.
Yay, and I have one right now, not so yay!
I bring goods back and forth, like a warden
Some who see me faint, like a mainden
I am almost never invited, I come unbidden
You scream, for on a dagger you have throdden
But wait a while, and watch me harden
Blood?
correct
I am an ever changing mirror
I take life from the source
To where it needs to be delivered
I always run my course
What is me?
A river?
that it be.
A red maiden, lives in a narrow lane
In the winter she is short, in the summer she is long
Translated from a riddle haiku. What is she?
A rose? Or a plant?
Good try, but no. Neither a rose nor a plant live in a narrow lane.
Hint: it’s related to temperature…
Thermometers? Probably not but ^^;;;
[i] I’m worn around the limb of those who prefer it the least,
I’m often looked at but rarely noticed,
I serve neutrally as a source of vital information,
Every single day.
What am I? [/i]
A watch 
?
Right you are, himebanana. A wrist watch.
You are given 12 balls. All of them are of equal weight except one. One ball is either lighter or heavier than the others, you don’t know which. You are given the task of finding this ball. You are given a scale to help you in your task but you may only use it 3 times.
How are you supposed to find the ball that has a different weight than the others?