ggab wrote:
I used mine, before I bought the 100-400 IS L USM II, to shoot soccer games along with my 70-200 f/2.8 III.
Now it is a back up.
The OP has a T5 and likes to shoot wildlife and nature.
I would suggest looking into a used 7DII and keep the T5 as back up or sell the T5.
Getting a EF400mm F/5.6 would allow for this, financially as would the 70-300. Just a thought.
The T5 is just great. Lenses are a much better investment. Much easier and cheaper to upgrade the camera as you need more capability. You have to go pretty high end cameras to spend as much as a lens and a lens will outlast several generations of cameras. That is why I would go the lens first. Then when you feel the camera is possibly lacking upgrade it.