Can you buy lenses for nikon p520 camera?

I'm not an expert when it comes to cameras but I'm looking to invest in one and i want to know if the nikon p520 is a good one for bird watching and nature pics. I was wondering if you can add lenses to improve the quality? If so what lenses are recommended? Or what would be a good camera for my purpose?

This is a fixed lens camera and you can't add lenses.

This is Nikons best bridge camera, and the lens is built in. It will be fine if you don't want photos bigger than 4" x 6"'s.
It has a killer zoom.

While the P520 can do what you want, you can't use other lenses.

For that you will need to invest a lot more money on a camera like the Nikon D7100 and some long lenses like the Nikkor AF-S 70-300 mm VR or even a nice 300 mm f/2.8 or 400 mm f/2.8. As you can see, better quality will require you to spend more money