Skip to main content
USGS - science for a changing world
Advanced Search

Filters: Tags: eyes (X)

26 results (37ms)   

View Results as: JSON ATOM CSV
thumbnail
A crepuscular or nocturnal lifestyle has evolved in bees several times independently, probably to explore rewarding pollen sources without competition and to minimize predation and nest parasites. Despite these obvious advantages, only few bee species are nocturnal. Here we show that the sensitivity of the bee apposition eye is a major factor limiting the ability to forage in dim light. We present data on eye size, foraging times, and light levels for Megalopta genalis (Augochlorini, Halictidae) in Panama, and Lasioglossum (Sphecodogastra) sp. (Halictini, Halictidae) in Utah, USA. M. genalis females forage exclusively during twilight, but as a result of dim light levels in the rain forest, they are adapted to extremely...


map background search result map search result map Light intensity limits foraging activity in nocturnal and crepuscular bees Light intensity limits foraging activity in nocturnal and crepuscular bees