Northern spotted owl
Videos
The northern spotted owl is one of three spotted owl subspecies. A western North American bird in the family Strigidae, genus Strix, it is a medium-sized dark brown owl native to the Pacific Northwest
Spotted Owl Shasta–Trinity National Forest
Northern spotted owl, Oregon Zoo, Portland, Oregon
Northern Spotted Owl.USFWS
Bioindicator
Videos
A bioindicator is any species or group of species whose function, population, or status can reveal the qualitative status of the environment. The most common indicator species are animals. For example
Northern spotted owl
…A western North American bird in the family Strigidae, genus Strix, it is a medium-sized dark brown owl native to the Pacific Northwest. An important indicator species, the northern spotted owl remains threatened due to continued population decline from human-caused habitat destruction and competition with invasive…
Caddisfly (order Trichoptera), a macroinvertebrate used as an indicator of water quality.
The lichen Lobaria pulmonaria is sensitive to air pollution.
Populations of American crows (Corvus brachyrhynchos) are especially susceptible to the West Nile Virus, and can be used as a bioindicator species for the disease's presence in an area.