As early as March, these striking little birds with yellow throat feathers, black and white streaks, and black eye patches, return to Kentucky to breed. While Spanish moss is a favorite nesting material, yellow-throated warblers will also form their cup-shaped nests using grasses, weeds, and pieces of bark. They usually stay high in the treetops in pine forests or woodlands by streams, but sometimes you can spot them hopping along branches or creeping up and down trees probing for insects with their sharp narrow bill.