Description: Bright yellow below and yellowish olive above. Males have a distinctive black cap, while adult females have an olive to black crown.
Migratory Status: Summer residents of Rocky Mountain National Park.
Habitat: Breed in willow thickets of lakeshores, stream banks and wet meadows at or just above timberline to 11,500 feet and occasionally 13,000 feet.
Diet: Eat mostly insects that they glean from the leaves and branches of deciduous trees and bushes.
Last updated: July 19, 2018