Sentences with phrase «owl populations»

The numbers reveal that the snowy owl population in particular boomed and that many other birds showed up in more northerly latitudes than usual.

This research indicated that since monitoring began spotted owl populations declined 55 - 77 percent in Washington, 31 - 68 percent in Oregon and 32 - 55 percent in California.

Prairies are probably just a normal wintering ground for some of the Arctic snowy owl population, the researchers say.

More generally, the shift in the tawny owl population shows that climate change can lead to a reduction in genetic variability within species — even at the detriment to traits that once favored survival.

Dr. Katie Dugger, a research biologist at the USGS Oregon Cooperative Fish and Wildlife Research Unit, Oregon State University and lead author on the report, said that «This study provides strong evidence that barred owls are negatively affecting spotted owl populations.

By reporting your owl sightings, you will provide valuable information about the owl population in the state.

These reports provide valuable information about the owl population in the state.

Northern spotted owl populations are declining in all parts of their range in the Pacific Northwest, according to research published in The Condor.

Spotted owl populations and survival rates have increased on the latter area since the removal of barred owls started.

Relationships between spotted owl populations and climate was complex and variable, but rangewide, the study results suggested that survival of young spotted owls and their ability to become part of the breeding population increased when winters were drier.

As for the mice and rats cats take; it's no wonder native hawk and owl populations have plummeted.

It also calls for culling the barred - owl population that has taken over the spotted - owl habitat, according to the Fish and Wildlife Service.