- The cloud-forests on the Sierra Miahuatlán were essentially unspoilt by human activity until the mid-1960s, when huge areas were cut and burnt for the planting of maize. Lower montane forest in the sierra is still being cleared, largely for the cultivation of citrus fruits
The blue-capped hummingbird or Oaxaca hummingbird (Eupherusa cyanophrys) is a species of hummingbird endemic to subtropical moist forest in the southernmost portion of the Sierra Madre del Sur in the Mexican state of Oaxaca. Its tiny range is threatened by habitat loss.
Like the white-tailed hummingbird, it is sometimes considered a subspecies of the more widespread stripe-tailed hummingbird.