Art Deco Birds 500pc Puzzle

Here's the Twist:
The puzzle ON the box is more than a bit different from the puzzle IN the box.  What happened here?

About the Artist:
Illustrator Tim Chapman, an Australian artist now rooted in Minnesota, brings his bold colors and graceful geometry to Art Deco Birds. His love of nature and storytelling shines through a timeless design featuring sixteen beloved songbirds—some perched in unexpected places—sure to delight birders and puzzlers alike.