Animals

No! After the dinosaurs died out, nearly 65 million years passed before people appeared on Earth. However, small mammals (including shrew-sized primates) were alive at the time of the dinosaurs. Many scientists who study dinosaurs (vertebrate...
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. Also, even if all of the roughly 700...
The largest complete dinosaur we know of was Brachiosaurus ('arm lizard'); it reached 23 m in length and 12 m in height (about the length of two large school buses and the height of a four-story building). Fragmentary leg bones and vertebrae of even...
Under normal conditions, humans are unlikely to be infected with West Nile Virus by handling a sick or dead animal. However, there are a number of other infections that could potentially result from handling an animal. To protect yourself from exposure...
"Animal Feeding Operations: Effects on Hydrologic Resources and the Environment" highlights many potential effects of animal feeding operations (AFOs) that were discussed at a meeting co-sponsored by the USGS Office of Water Quality and the Toxic...
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.The National Institute of Occupational Safety and Health (NIOSH) has detailed recommendations for ways...
Figuring out ways to estimate animal population sizes and their trends involves a lot of research time at the USGS Patuxent Wildlife Research Center. As you probably know, animals do not particularly want to be counted and it becomes quite a tricky...
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. strain of WNV since its discovery in 1999, but many...
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. Many imperiled species have legal protection under Federal laws such as the Endangered Species Act...
Chronic wasting disease (CWD) is an always-fatal, neurological illness occurring in North American cervids (members of the deer family), including white-tailed deer, mule deer, elk and moose. Since its discovery in 1967, CWD has spread geographically and...