300mm F/2.8 Mk II on a 5D3.
Seriously good Image, well done.
In the Wild ?? (Safari) or in the Zoo/Wildlife Park ?? Not that it matters, just a superb example of what this Lens can do in the right Hands, I own the 200f/2, 300f/2.8 V2, 400f/2.8 V2 & just recently the 600f/4 V2, 50% of my shooting is with the 300f/2.8 V2, I feel it's the best Lens Canon have made to date.