You can't make a request for a view when you book.
You can do so when you check-in to be seated.
We went for lunch. Got there a few minutes before opening and were seated right up next to the window! There was some big black bird (probably about 5 feet tall) with some beautiful plumage on it's head) that kept coming right up to "our" window. We really thought he was interacting with us, but were later told that he was reacting to his reflection in the glass. Could see zebras, ostriches, and many other animals in the distance. After lunch, we went outside and there were "guides" from Africa who pointed out many more animals and interesting facts. I wouldn't trade that lunch for anything!
As to what time to plan for Feb - I'm sorry but I can't answer that. We went in the summer.
I was advised by those in the know here on the Dis that it was more advantageous to see the animals for lunch, so that's what we did. If you go closer to dinner time, you may run the risk of the sun setting and not being able to see the animals at all.....