Bird cards allow you to photograph a specific bird.
Each national park and each bird have their own cards. Generic cards for national parks allow you to photograph any bird available in the park.
Once selected, a specific card will increase the chances of photographing that particular bird, based on the percentage indicated in the bird's description.
After obtaining the required copies, it is possible to upgrade each bird card by leveling it up, which also grants experience points. It will be possible to level up by earning enough experience points. After a certain number of levels, access to a new national park will be unlocked.
Packages and cards are available for purchase in the in-game store. Every 24 hours, you can purchase up to 3 randomly drawn cards in the store.