LUMIX G-6 Lense

[Alexa9214]

Hi you guys I'm looking for a long distance lens for my Lumix DMC G-6 camera
I looking for 200mm and more (200-600/ 150-600 etc.)
I prefer a lens without an additional adapter, didn't set a budget limit yet.

Main use is for wildlife, birds and landscape shots...
Any recommendations ?

THANKS