American Yellow Warbler

Isla Isabela, Galapagos, Ecuador (2005).
Males have bright yellow color with red cap and dark brown in the wings and tail feathers. This one should not have been much more than 10-15 cm in size.
Habitat: In this case it was found at the top hills of a volcano area in Isabela Island. But they migrate great distances and can be found in North America as well.