World Bird List

Species factsheet
Orange-crowned Warbler (Leiothlypis celata)

Order: Leiothlypis celata
Family: New World Warblers (Parulidae)

Voices can be found here (external link)
Subspecies and Distribution
Subspecie Distribution
celata c Alaska to s Canada
lutescens w Canada and w USA
orestera wc Canada and wc USA
sordida s California (sw USA) and nw Mexico