Instructions
Count the number of unique piñata species currently living your garden. If you have fewer than 15 species, press "F3" on your keyboard to open your garden journal. To open your journal on the Xbox 360, press "X" on your controller and use your left analog stick to select your journal from the radial menu.
Use your mouse or the left analog stick on your Xbox 360 controller to view the residency requirements for each pinata species listed in your journal. Fulfill any of these requirements to gain residents until you have at least 15 resident species, one of which must be the "Buzzenge." To conserve your garden's space and resources, select piñatas for your garden with similar requirements.
Visit Costolot's General Store in your village, and find an oak seed in the shop's inventory. Click or press "A" to purchase the seed and use your mouse or left analog stick to select a location in your garden to plant the seed. Wait for the Eaglair to visit your garden. Allow the Eaglair to eat your resident Buzzenges. When the Eaglair has consumed four Buzzenges, it will become a permanent resident of your garden.