All pictures breeding adult male
The male Chestnut sided warbler is one of the most beautiful birds in the USA. The (breeding male) has a chestnut colored streak on both sides of this warbler it is all white on the underside it has a white and black face with a yellow cap on the top of its head and the wings and the back is streaked with gray, yellow and brown. The (breeding female) has a gray and white underside with greenish yellow cap. Its wings that are streaked with black and white and it has 2 yellow wing bars and the adult female has a chestnut stripe on its side. And it has a slight black and gray.