Radar surveys: One method used to count Marbled Murrelets in specific watersheds is radar surveys. Radar is a tool for locating objects using high frequency radio waves. Radio waves are emitted by the ...

The North American Marbled ... habitat sites are selected in which to measure those forest characteristics that are also recorded at nest sites. The results from this research will provide us with ...

RANGE: Pacific Coast of North America from the Aleutian Archipelago and southern Alaska to central California just south of the San Francisco Bay THREATS: Habitat loss due to ... Service estimated ...