Mule deer navigate in spring and fall mostly by using their knowledge of past migration routes and seasonal ranges.
Scientists find that black carbon is a good tracer to separate cooking organic aerosol from traffic-related organic aerosol.
There are only two northern white rhinos left worldwide, both of them female. Saving this representative of megafauna from extinction seems impossible under these circumstances, yet an international consortium of scientists and conservationists just completed a procedure that could enable assisted reproduction techniques to do just that. On August 22, 2019, a team of veterinarians successfully harvested eggs from the two females who live in Ol Pejeta Conservancy in Kenya.
A global study comparing 2,062 birds finds that, in highly variable environments, birds tend to have either larger or smaller brains relative to their body size. Birds with smaller brains tend to use ecological strategies that are not available to big-brained counterparts. The new research from biologists at Washington University in St. Louis appears Aug. 23, 2019 in the journal Nature Communications.
Mule deer avoid areas close to such human disturbance, even when there's quality forage in those areas.
Mountain range uplift, river formation and other events that occurred 30 million years ago explain the emergence of new species of the arachnid in the biome's southernmost portion, according to a Brazilian study.
Many wild southern sea otters in California are infected with the parasite Toxoplasma gondii, yet the infection is fatal for only a fraction of sea otters, which has long puzzled the scientific community. A study from the University of California, Davis, identifies the parasite's specific strains that are killing southern sea otters, tracing them back to a bobcat and feral domestic cats from nearby watersheds.
Western pond turtles got fatter and healthier after scientists removed nearly 200 invasive red-eared slider turtles from the UC Davis Arboretum, reports a new study published recently in the journal PeerJ. The study is the first to quantify competition between these two species in the wild.
In what likely is the first study on the evolution of dietary preferences across the animal kingdom, UA researchers report several unexpected discoveries, including that the first animal likely was a carnivore and that humans, along with other omnivores, belong to a rare breed.
Researchers at the University of Cincinnati found that Charles Darwin's famous finches defy what has long been considered a key to evolutionary success: genetic diversity. The study of the finches of the Galapagos Islands could change the way conservation biologists think about species with naturally fragmented populations to understand their potential for extinction.