Biology General

An Endangered Species is one reduced to such low numbers of individuals that the population is at risk of becoming extinct. Species can become endangered due to adverse modifications or threats to their living environment, including habitat loss and...
Extinction and endangerment have a scientific and a legal (or regulatory) basis. An example of an extinct species is the Passenger Pigeon (Ectopistes migratorius). The species went from abundant in the 19th century to extinction early in the 20th century...
Finding the scientific name requires detective work, because there can be multiple common names that can vary geographically, and similar common names can refer to a variety of organisms. A good starting point is the Integrated Taxonomic Information...
When conducting surveys on private property, USGS researchers comply with State and Tribal laws, including trespassing and privacy laws. USGS researchers are required to obtain written permission from the landowner when conducting new surveys, not to...
USGS's Status and Trends of Biological Resources Program supports and provides the collection and analysis of biological data for use by natural resource managers, scientists, and the general public.The Program's mission is to:Measure - the status and...