They're well exposed and sharp. Color looks good. Composition is dead center for the most part. It's the typical zoo shot. I don't think zoo animals really qualify as wildlife. They're kind of a category all their own. Zoo Animals.
Check out the noob section...there's lots of good resources. Read about composition, exposure, color saturation...and all that jazz.
But briefly...there are some color saturation issues as well as exposure problems on the animal IMO..and especially in the background. As far as composition goes...a centered subject like this is most always considered to be boring. Even though the animal has an interesting pose or whatever...it still just looks like a picture of an animal at a zoo. A picture of wildlife in a concrete bunker is not very interesting. The photo leavens nothing to the imagination..just an animal in a zoo.
There's lots of stuff you could do with this sort of images, though. Check out the noob instructional stuff on here...then ask the gurus...in that order Good luck!