How to Track Pokémon

When encountering a Pokémon, you can straight away identify by the tiny ring surrounding it whether it is spawned in the wild or attracted by items.

Pokémon will be stationary when spawned.
Everyone in the vicinity can see the same Pokémon and catching it doesn’t despawn for others.
Wild Pokémon has a 15 minutes despawn time.
Wild Pokémon seems to spawn at the same spawning point, and it is rumored that the same spot will spawn a new Pokémon every hour at the same minute.
If there are abnormally high amount of rare Pokémon of the same type spawning in an area, it is called a nest. Not those common Pokémon like rattata and pidgey which could be found anywhere.

Lure module and incense spawns a new Pokémon roughly every 5 minutes, giving 6 Pokémon for its 30 minutes timespan.
Incense will increase the spawn rate of 1 Pokémon a minute every 200 meters traveled when moving.
Pokémon spawned by incense can only be seen by you.
The effect of lure module benefits everyone nearby.
These Pokémon despawns in 2.5 minutes.

Wild Pokémon has a predetermined spawning point and does not spawn at random spots. It is rumored that Pokémon will respawn every hour on the same minute at those spawning spots.
There are rumors that the more Pokémon captured from a spawning spot, the more often that it will respawn, up to 15 minutes once.
Spawned Pokémon does not move and will be stationary.
Wild Pokémon will despawn after 15 minutes. Pokémon from lure module and incense will despawn after 2.5 minutes.
If two trainers encounter the same Pokémon, the CP might be different but the IV, weight, and height will remain the same.
Two trainers of the same level will encounter Pokémon that will have the exact same CP.
Captured Pokémon max at level 30 and will be upgradable till level 40.