Anna's Hummingbird, Floral Nectar (image) University of California - Davis Share Print E-Mail Caption The UC Davis study found that floral nectar contained mostly bacteria found only in flowers while feeder sugar water contained generalist bacteria that grow in many types of aqueous environments. Pictured, an Anna's hummingbirds feeds on floral nectar. Credit Scott Logan/Wild Wings Ecology Usage Restrictions Provide credit. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.