Blood Moon Tattoo
How to draw a bird.
I'd switch it up to your favorite mountain range, and then the stars as your horoscope constellation
Obviously not a tree, but a good example of clean lines, realistic and balanced while being natural. Also a small geometric touch.
wolf abstract tattoo (21)
Oooh, look at all that color saturation. Love it.
Tink Model Sheet by Whitney Pollett, via Behance
Super delicate botanical flower tattoo
The Nine Circles of Hell