The guide below explains how to increase the level of a bird. When you obtain a specific bird, its available points are indicated as a total on that bird's card. Let's say you have obtained 5 copies of a specific bird: When you view that bird, prior to enhancement, the copies are displayed as 5/2, where 2 is the number of points required to increase the level.

An enhancement consumes the necessary copies, so the result will be displayed as 3/4. The first number indicates the copies currently accumulated, while the other number indicates how many copies are needed to continue with the enhancements. Simple, right?

Improving the birds increases the chance to photograph birds up close and with greater sharpness, but it also provides experience to increase the level of your account and travel the world to visit new national parks.