https://dxnest.com/xuong-gia-c....ong-yen-hu-nha-trang
A large, asymmetrical woodpecker with a striking red color on the back and wings, the northern flicker is a sight to behold. Flickers visit feeders and bird baths but prefer open country with short vegetation. They may also be seen perched in trees near the ground where they probe for insects with their unusual, slightly curved bill. Flickers are cavity nesting birds, which means they use holes in trees to raise their young. However, they sometimes nest in nest boxes too, especially if natural cavities are scarce in the area. Nest box