There are seven species of Pacific salmon. Five of them occur in North American waters: chinook, coho, chum, sockeye, and pink. Masu and amago salmon occur only in Asia. There is one species of Atlantic salmon.
Approximately 700 species have been named. However, a recent scientific review suggests that only about half of these are based on fairly complete specimens that can be shown to be unique and separate species.
Bird-to-human transmission of West Nile Virus is extremely rare and is only possible through contact with blood or other tissues of infected animals.
Figuring out ways to estimate animal population sizes and their trends involves a lot of research time at the USGS Patuxent Wildlife Research Center.
There is a nation-wide decline in many bird species. This has been documented in annual Christmas Bird Counts, Breeding Bird Surveys, and reports from bird enthusiasts.
African buffelgrass is spreading rapidly in the Sonoran Desert of southern Arizona, creating novel fire risks in both natural and urban areas and threatening conservation efforts.
Tamarisk is a familiar invasive species across the American West, occupying hundreds of thousands of acres of river floodplains since the 1960s. This shrub or small tree, which is also known as saltcedar, has successfully colonized a range of sites.
It is possible that there may have been a mutation in the virus that is causing a higher number of species to be affected this year. There is currently no evidence of significant mutation in the U.S.
Imperiled Species is a general term used to identify species and populations of animals and plants that are in decline and may be in danger of extinction.
Chronic wasting disease (CWD) is a fatal, neurological illness occurring in North American cervids (members of the deer family), including white-tailed deer,