Birds and Flocks
Birds and Flocks is a nifty immersion mod that adds additional vanilla "fleeing red-winged blackbird flock" special effects to the game. Translation: It increases the population of the vanilla birds you see flying around in the game. It's a nice touch.
You'll also start to notice hawks along Skyrim's cliffs, tundras, forests, and mountain ranges. You'll also notice more maps inside the game's many caves. It's a nice touch.
The Xbox One version also comes with new sound effects, some bug fixes for the vanilla flocks and hawks and some other minor changes.
For more, take a look at the review above.