About
Ecological Expertise
Since the founding of Colibri in 2010, we have planned, overseen, managed, coordinated, and carried out biological resource investigations throughout California and the northern Gulf of Mexico.
Our scientists are distributed among six locations in California and have a particularly detailed knowledge of flora and fauna of the San Joaquin Valley and its surrounding foothills and mountains.
Some of the special-status species we deal with most often include:
Plants
Invertebrates
Amphibians
Reptiles
Birds
Mammals
Leadership Team
LAURA R. DAVIS, M.A. Chief Executive Officer
Laura worked for 20 years in public education in Fresno and Marin counties as a teacher and administrator....
JEFF N. DAVIS, B.S.
Principal and
Chief Operating Officer
Jeff has been a student of natural history for as long as he can remember. He spent much....
CATHERINE D. DUNLAP, B.A. Operations Manager
Catherine was born and raised in Fresno, California. She earned a Bachelor of Arts degree in English Literature....
RUBY R. REBENSDORF, B.S.
Staff Scientist and
Assistant Project Manager
Ruby has always enjoyed being outdoors, and growing up in Fresno gave her many opportunities...
PATRICK N. SAULS, M.S., AICP Senior Scientist and Project Manager
Patrick is an environmental planner and project manager with 20 years professional experience. He grew up in Southern...
RYAN R. SLEZAK, M.S.
Senior Scientist and
Project Manager
Ryan is a biologist with about 15 years of professional experience. Growing up in the forests of Northern…
Full-Time Team Members
GRAHAM L. BIDDY Senior Scientist
Graham has been working as a wildlife biologist for more than 10 years. He developed his conservationist mindset…
JACOB H. BOLLINGER, M.S. Staff Scientist
Jacob grew up in the forested hills of south-central Indiana where he developed a passion for wildlife by exploring his backyard ...
HOWARD O. CLARK, JR., M.S. Senior Technical Specialist
Howard has more than 20 years of professional wildlife and research experience. He is certified by the Ecological…
CASSIE M. CONTRERAS, B.S. Field Scientist
Cassie grew up in Fresno, California, where she spent much of her childhood outdoors in the Sierra. Her love of the natural...
TALA S. DAVIS, B.S. Field Scientist
Tala Davis (she/they) has loved the natural world and conservation as long as they can remember...
STEPHANIE L. DORIA, M.S. Field Scientist
Stephanie grew up in Visalia, just down Highway 99 from Fresno. As a child she spent her mornings waking up early to...
MICHELLE L. HARRIS, B.S. Staff Scientist
Michelle grew up in Sanger, California, where the Sierra foothills were her backyard. While attending Reedley College...
SARAH A. JACOBSEN, B.S. Field Scientist
Sarah grew up in Mariposa, California, just outside of Yosemite National Park. She developed...
SAMANTHA M. LOVE, B.S. Field Scientist
Samantha developed a passion for botany and wildlife at a young age. She grew up in the high desert...
KATHERINE P. PHILLIPS, B.S. Field Scientist
Katherine grew up on a farm in the Central Valley,
where her love of the outdoors began.
CAMERON A. REID, B.S. Field Scientist
Cameron grew up spending time outdoors through his involvement in Boy Scouts of America. Those experiences left him...
ANTONIO RUVALCABA, B.S. Field Scientist
Antonio grew up in Fresno, California. Inspired by family trips to nearby Yosemite National Park, he fell in love with...
STEPHANIE G. SANTANA, B.S. Field Scientist
Stephanie is from Sacramento, California. As a child she spent most of her time outside, sharing her discoveries...
NORMAN “RANDY” SISK, M.S. Senior Technical Specialist
Randy is a wildlife biologist who specializes in herpetology. His interest in herpetology
began as...
JACKSON XIONG, B.S. Staff Scientist
Jackson began his wildlife career as a youth running the forests and hills of the Sierra Nevada, turning over rocks and climbing …
NATALIE YORBA, M.S. Staff Scientist
Natalie grew up in San Diego, California. As a kid she preferred animal documentaries over cartoons...
On-Call Team Members
ROB K. BURTON, PH.D. Senior Scientist
Rob has worked with wildlife for over 30 years. His interests have included a broad diversity of species such as California...
PHILLIP J. CAPITOLO, B.S. Senior Scientist
Phil is a biologist with more than 20 years of experience studying a variety of North American bird taxa,….
PETER A. GAEDE, B.S. Senior Scientist
Peter is an ecologist with more than 15 years of experience. He has conducted fieldwork for consulting and research…
DAVID B. LEWIS, B.A. Senior Scientist
Dave has more than 40 years of experience in the biological sciences, including 35 years of field experience…
MICHAEL W. PARKER, M.S. Senior Scientist
Mike has over 25 years of natural resource management, research, and consulting experience throughout the western U.S. with…
KRISTY L. USCHYK, B.S. Senior Scientist
Kristy has worked as a wildlife biologist for over 20 years. She has worked on a wide array of projects including coastal…
We proudly support the following community organizations:
