You can also use your aviary to attract your favorite type of bird. Note, however, that Most bird houses are of a standard size to attract most small to medium-sized bird types. The houses themselves are usually about 12 cm high, 8 cm deep and 6 cm wide, which is suitable for many species of birds.
The most important factor is how big the entry hole is. The hole needs to be big enough for the bird you want to attract, but small enough to keep larger birds and predators out. For example a Songbird would use a 1½ inch hole and Wrens Like a 1 ¼ inch hole, according to bird experts.
Certain birds like certain types of birdhouse designs too. For example, robin like platforms / shelves and Martins like apartment complex houses with multiple openings. The important step is figuring out what type of habitat your favorite bird needs and buying accordingly.
You can also search for bird houses based on the type of bird you want to attract. For example, if you use “Owl Birdhouse” you may get a bird box made specifically for Tawny Owl.