title: Green-backed whistler
text: # Green-backed whistler
  
  The green-backed whistler (Pachycephala albiventris) or olive-backed whistler, is a species of bird in the family Pachycephalidae. It is endemic to the Philippines.
  
  Its natural habitats are tropical moist lowland forest and tropical moist montane forest.
  
  ## Taxonomy and systematics
  
  Formerly, some authorities considered the green-backed whistler to be a subspecies of the mangrove whistler.
  
  ### Subspecies
  
  Three subspecies are recognized:
  
  * P. a. albiventris – (Ogilvie-Grant, 1894): Found on northern Luzon (Philippines)
  * P. a. crissalis – (Zimmer, JT, 1918): Originally described as a separate species. Found on central and southern Luzon (Philippines)
  * P. a. mindorensis – (Bourns & Worcester, 1894): Originally described as a separate species. Found on Mindoro (Philippines)
  