Discover an adult coloring book collection of all bird species in the world in 3 volumes. Each coloring book contains about 55 species of birds from all over the world. A masterpiece produced by more than 10 different artists in different countries to satisfy any taste. Unlike most adult coloring books out there that have only a few species, this Advanced Realistic Bird Coloring Book contains more than 50 bird species for you to color. Forget this stressful civilization. Travel the world along with the most beautiful birds on our planet. See them flying and hear them singing under your coloring pencils.