Department of Biology

Jeffrey Riffell, a University of Washington professor of biology, wants to understand how female mosquitoes find find a host to bite for a bloody meal. His research has shown that hungry mosquitoes find us by following a trail of scent cues, including chemicals exuded by our skin and sweat, as well as the carbon dioxide gas we exhale with each breath. Mosquitoes also like colors, at least certain ones. His team is closing in on how the sense of smell and vision work together to help a mosquito zero in for the final strike and get her blood meal.

When sea otters face competition for their favorite kinds of food, some use tools — like rocks and even glass bottles — to open tougher prey. That’s according to a new study of sea otters in Monterey Bay, California. Chris Law, research scientist and teaching professor in biology at the UW, is interviewed.

And a new study offers a fuller understanding of tool use by sea otters. Otters in California's Monterey Bay use rocks and other objects to break open hard prey, letting them access certain larger prey and reducing their tooth damage. Chris Law, research scientist and teaching professor in biology at the UW, is quoted.

The College of Arts & Sciences celebrates undergraduate and graduate students from across all four divisions, who are recognized for making the most of their time at the UW. 

Anatomy for Change, a program for students underrepresented in healthcare careers, provides opportunities to spend time in an anatomy lab.

Often vilified by Hollywood as potential competitors and even threats to humans, both sea dwelling and fictional off world octopuses have made many a filmgoer squirm in horror. Aside from their piercing eyes, their brains and morphologies are as different from humans as any species could be. Peter Ward, professor of Earth and space sciences and of biology at the UW, is quoted.

Hummingbirds, I realized, are not just adorable. They're also jerks. Yes, jerks. But don't take my word for it. Alyssa Sargent, doctoral student of biology at the UW, is quoted.

The University of Washingtonâs graduate and professional degree programs were widely recognized as among the best in the nation, according to U.S. News & World Reportâs 2025 Best Graduate Schools rankings released late Monday.

The organization that honors Rosa Parks, Elie Wiesel, and Jane Goodall has also celebrated three members of the UW community. Honorees include: neurobiologist Linda B. Buck, ’75; Theodore Roethke, English professor at the UW, 1947-1963; and master glass artist Dale Chihuly, ’65.

Alejandro Rico-Guevara, assistant professor of biology at the UW and curator of ornithology at the UW Burke Museum, remembers when he first realized he was a hummingbird guy — not like an "I fill my hummingbird feeder every week" guy but an “I want to know everything about these birds” guy.

Certain chemicals break down a primrose’s key fragrance molecules, blunting its scent. The UW's Jeff Riffell, professor of biology, and Joel Thornton, professor of atmospheric sciences, are quoted.

Natural history museums have entered a new stage of discovery and accessibility â one where scientists around the globe and curious folks at home can access valuable museum specimens to study, learn or just be amazed. This new era follows the completion of openVertebrate, or oVert, a five-year collaborative project among 18 institutions to create 3D reconstructions of vertebrate specimens and make them freely available online. The team behind this endeavor, which includes scientists at the University of Washington and its Burke Museum of Natural History & Culture, published a summary of the project March 6 in the journal BioScience, offering a glimpse of how the data can be used to ask new questions and spur the development of innovative technology.

A newly discovered genetic mechanism helped eliminate the tails of human ancestors. David Kimelman, professor emeritus of biochemistry at the UW, is quoted.

Seattle scientist and conservationist Estella Leopold has died at the age of 97. Leopold spent most of her career at the University of Washington, teaching and learning about the distant past through pollen deposits. P. Dee Boersma, professor of biology at the UW, is quoted.

You might not know it, but some moths can smell just as well as dogs. The nighttime insects use their antennae to sniff out flowers heavy with pollen up to a mile away. New research from the UW shows pollution in car exhaust can blunt the flowers’ scent – making it hard for pollinators to find the blossoms. The UW's Jeff Riffell, professor of biology, and Joel Thornton, professor of atmospheric sciences, are quoted.