This map supplements a National Geographic Daily News article about the implications for wildlife management when two owl species are found competing for habitat. The Northern spotted owl is an iconic threatened species found in the Pacific Northwest, but has been encroached upon by the barred owl in recent decades. This map conveys the westward expansion of the barred owl, and quite possibly warns of further southern progression.

CREDIT: NG staff, Jamie Hawk. Sources: USGS; Oregon Cooperative Wildlife Research Unit; U.S. Forest Service; IUCN